I love U2's original version of the song. I just got a hold of
Joshua Tree last week and man, it's an awesome CD. I think "Bullet The Blue Sky" is probably my favorite song on there. I'll have to check out those two covers you mentioned.
Speaking of covers of U2 songs, has anyone heard Shinedown's version of "One"? It's amazing, imo.
http://www.strippedmusic.com/arch_shinedown.html