Wikipedia has a lengthy list of current social networking projects or services that have launched globally--including a few (but just a few) services geared toward the mobile platform.
On second look, myGamma and Dodgeball seem to be the only mobile-specific social networking apps on the list. That's it?
Cingular alone has four social networks on its deck: Rabble, CoolTalk, MySpace and Facebook--but only the second two are listed. Juice Wireless is another company with a good amount of VC funding, but little user base and notoriety. Enpresence is a fascinating service that lets other mobile users know when a friend is nearby.
Flickr, MySpace, Facebook and most of the other big names on this list have already added mobile components to their offerings and each of the start-ups on here best consider it a must have--by this time next year the ones without mobile functionality porbably won't make the cut.
My favorites off this list include: aSmallWorld (known as Snobster by the cynical), Connect.ee (Estonian service--a country with free WiFi at every gas station), and Dodgeball, because I'm a sucker for the much romanticized location-based services sector.
Enjoy this list from Wikipedia. Add the ones you see missing. And create the ones in between.
This is a list of notable social networking websites.
| Name | Description/Focus | User count | Registration |
|---|---|---|---|
| 43 Things | Tagging | 627,000[1] | Open |
| ActiveRain | Real estate professionals | 5,374[2] | Open |
| Adoos | Latin America and Spain classifieds, personals | 1,000,000 | Open |
| AIM Pages | AOL Instant Messenger | Unknown | Open |
| aSmallWorld | Globally well-connected and successful people with genuine profiles and networks | 150,000[3] | Invite-only |
| BlackPlanet.com | African-Americans | 18,000,000[4] | Open |
| Babbello | Australian teenagers | 30,000[5] | Open |
| Bebo | Schools and colleges | 22,000,000[6] | Open |
| Blogger | Blogging | 16,000,000[7] | Open |
| Blurty | Blogs, based on LiveJournal | 947,169[8] | Open |
| Bolt | General (music and video) | 4,000,000[9] | Open |
| CarDomain | Car enthusiasts | 1,600,000[10] | Open |
| Care2 | Green living and activism | 6,600,000[11] | Open |
| Classmates.com | School, college, work and the military | 40,000,000[12] | Open |
| Connect.ee | Estonia | 39,000[13] | Invite-only |
| Consumating | "Consumeetings" | 21,000[14] | Open |
| Cyworld | South Korea | 15,000,000[15] | Open |
| Dandelife | Collective narratives or "shared biographies" | unknown | Open |
| DeadJournal | "Dark" blogs, based on LiveJournal | 490,310[16] | By invite or payment |
| Dodgeball.com | Mobile location-based service | unknown[17] | Open |
| Doostang | Online career community | 53,000[18] | Invite-only |
| DowneLink | LGBT | Unknown | Open |
| Draugiem.lv | Latvia | 731,652[19] | Invite-only |
| Ecademy | Business | 100,000[20] | Open |
| Eons | People over 50 | Unknown | Open to people over 50 |
| General | 12,000,000[21] | Open | |
| Facebox | General | 1,046,696[22] | Open |
| Faceparty | British teens and 20-somethings | 5,900,000[23] | Open |
| Flickr | Photo sharing | 2,500,000[24] | Open |
| Friendster | General | 29,100,000[25] | Open |
| Frühstückstreff | General | 10,100[26] | Open |
| Gaia Online | General | 5,000,000[27] | Open |
| Gazzag | General | Unknown | Open |
| GoPets | Virtual pets | 400,000[28] | Open |
| GreatestJournal | Uses LiveJournal code | 1,514,865[29] | Open |
| Grono.net | Poland | 830,000[30] | Invite-only |
| Hi5 | General | 50,000,000[31] | Open |
| Hyves | General; focus on students and Dutch speakers | 2,311,790[32] | Open |
| imeem | media-centric social network with instant messaging functionality | Unknown[33] | Open |
| IMVU | 3D chat software | 1,000,000[34] | Open |
| IRC-Galleria | Finland | 350,000[35] | Open |
| iWiW | Hungary | 1,235,000[36] | Invite only |
| Joga Bonito | Football (soccer) | Unknown | Open |
| Last.fm | Music | Unknown[37] | Open |
| Business | 8,500,000[38] | Open | |
| LiveJournal | Blogging | 10,921,263[39] | Open |
| LunarStorm | Sweden | 1,200,000[40] | Open |
| MEETin | General | 50,000[41] | Open |
| MetroJoint | General | 1,383[42] | Open |
| MiGente.com | Latinos | 3,600,000[43] | Open |
| Mixi | Japan | 5,000,000[44] | Invite-only |
| MOG | Music | Unknown | Open |
| Multiply | "Real world" networking with definable relationships | 3,000,000[45] | Open |
| Music Forte | Music | 37,000[46] | Open |
| myGamma | Cell phones | 1,300,000[47] | Open |
| MySpace | General | 130,000,000[48] | Open |
| myYearbook | General | 950,000[49] | Open |
| Neurona | Spanish businesses and Italy | 690,000[50] | Open |
| Nexopia | Canada | 866,000 | Open |
| orkut | Owned by Google | 33,729,146 [51] | Open |
| Passado | General (business) | 4,700,000[52] | Open |
| Piczo | Teenagers, Canadians, photo sharing | 10,000,000[53] | Open |
| Playahead | Swedish teenagers | 2,000,000[54] | Open |
| ProfileHeaven | British teens | 100,000[55] | Open |
| Rediff Connexions | India | 1,400,000[56] | Open |
| Reunion.com | Locating friends and family | 25,000,000[57] | Open |
| Ryze | Business | 250,000[58] | Open |
| Sconex | American high schools | 500,000[59] | Open |
| Studivz | University students, mostly in the German-speaking countries | 1,000,000 | Open |
| Studybreakers | High school students | 34,000[60] | Open |
| Stumbleupon | Websurfing | 1,200,000[61] | Open |
| TagWorld | General (tagging) | 1,850,692[62] | Open |
| TakingITGlobal | Social action | 116,000[63] | Open |
| The Student Center | Teens and colleges | 800,000[64] | Open |
| Threadless | General | 364,474 | Open |
| Tribe | General | 554,993[65] | Open |
| Vampire Freaks | Gothic industrial culture | 650,000[66] | Open |
| VietSpace | A social network of Vietnamese | 20,000[67] | Open |
| Vox | Blogging | Unknown | Open |
| WAYN | Travel & Lifestyle | 7,000,000[68] | Open to people 18 and older |
| WebBiographies | Genealogy & Biography | 3,500[69] | Open |
| Windows Live Spaces | Blogging (formerly MSN Spaces) | 30,000,000[70] | Open |
| Xanga | Blogs and "metro" areas | 40,000,000[71] | Open |
| Business | 1,000,000[72] | Open | |
| Xuqa | Colleges | 1,000,000[73] | Open |
| Yahoo! 360° | Linked to Yahoo! IDs | 4,700,000[74] | Open to people 18 and older |
| Zaadz | Social consciousness | 17,627[75] | Open |