Tens of thousands of attendees descended upon Barcelona for the Mobile World Congress trade show this year. Microsoft, Nokia and Intel dominated the early announcements, but there have also been major carrier keynotes. Vodafone CEO Vittorio Colao touted his company's openness and warned about Google's dominance in the mobile search and advertising market. In between the keynotes, those on the show floor have been treated to a wide array of flashy new devices. Be sure to check out FierceWireless' on-the-ground coverage from earlier in the week as well in these two slideshows.