Try "Until the End of the World" "The Fly", and quite definitely the Zoo TV Version of "Bullet the Blue Sky."
Ok, UTEOTW isn't that bad, and neither is The Fly. But BTBS Zoo TV is just killer man. Another tough song is All Along the Watchtower Lovetown Tour (NOT R&H), Desire Lovetown Tour, and Electric Co.
Okay, to answer the question, "In A Little While" live is a sweet song. It may be difficult at first but you'll get is sooner or later. SBS is easy, and so is "Still Haven't Found." This one may strain your fingers though (n00bies).
"One" is also a fun song to play, though it is difficult for you first-timers out there. Finally, the song i am playing right now, "Party Girl"
Good times man, have fun