Though we'll see a number of new devices unveiled at CTIA, the biggest news of the week occurred over the weekend when AT&T announced that it had entered an agreement to buy T-Mobile USA for $39 billion. Executives from AT&T, Verizon Wireless, and Sprint (T-Mobile pulled out at the last minute) will be participating in a keynote roundtable on the first day of the show, which should make for some interesting discussion.