According to the Sidekick fan blog HipHop3, the Sidekick 3 will be released to the public June 26, following a launch party on June 20. The blog also reports that the Sidekick 3 will include an MP3 player called SonicBOOM. The price is rumored to be around $300 along with a $100 rebate. None of this, of course, has been confirmed by Danger or T-Mobile, but it is certainly plausible. Blog