A good slow one that i've been into a lot lately is Soulshine. A real easy acoustic song... and sounds awesome with a simple electric lead... Peep the tab at UG... it's an Allman Brothers song but the Warren Haynes version is the version I normally play. It's not real popular buts a killller tune and it's super easy.

As for a fast song...... I'm not too sure. I try to stay away from the really popular mainstream fast stuff like Green Day, Nirvana...etc... Maybe some Silverchair, Candlebox "Cover Me".... if you only have an hour you might want to stick with something punk like another Nirvana tune like Teen Spirit or Polly is a good one.... Or for another slow one do All Apollogies... that's a kick ass tune. Sorry my brain is locked... it's the end of the work day for me...