I maintain that this is a brilliant idea from u2.com, but what's really irritating me is sitting here and listening to the samples - it's clear every single song has been mixed and mastered, and is ready for release (great quality btw; much better than the rose bowl in both sound and performance). So if the CD ends up filled with loads of songs we have already, not only will we have missed the opportunity to hear great quality live versions of rarities, but said rarities will actually exist out there somewhere, out of reach 
Anyone considered a movement to organise a mass voting for rarities?
On the bright side, there's a decent future U2.com subscribers gift for when they run out of ideas right there in the remaining 24 songs.
That thought did occur to me... but it sure would suck if we had to wait another year for the 'second half'!
Monicalea, i'm worried that it will have mainly the 'standards' as well, but i doubt it's been chosen already - as UC pointed out, with all songs mastered, it's no more difficult to put the songs the fans want on there, and it serves to actually make the fans happy. If it's easy to do and it keeps customers paying, this voting system is most likely genuine. However, from the polls, it's apparent that the fans themselves are voting for yet more versions of Streets, One etc, at the expense of never-before-played-live songs (like YBR) and never-even-
released songs (Stingray). So we have only 'ourselves' to blame if the track listing ends up being mediocre... but in a way, that would be even more frustrating than if u2.com simply created one themselves.