Get ready for U-2 at half-time of Wednesday night's opening game of the NBA finals.  The Boston Globe reports that U-2 already had a concert scheduled at the Fleet Center.  Lead singer Bono was enthusiastic about the NBA's proposed live TV gig, so U2 revised the timing of the concert to be ready for prime time.  U2 will be performing two songs, including 'Elevation,' their single from 'Lara Croft: Tomb Raider.' They'll also do a third song as part of the postgame CNBC coverage.  Game four will feature Destiny's Child, and Sugar Ray appears on Game five.  Peter Vescey will have to keep his half-time comments short.