At the moment I'd have to go with something from the new Pearl Jam cd
But one song I've never stopped liking heaps is:
Rabbit in you Headlights - Unkle
Similarly, I am obsessed with "Chomp Saraba" by Amon Tobin. If ever there was a song to zip through a futuristic city in a flying car to it's that song.
There is a cover of the Peter Green song 'Oh Well' by a Norwegian guitarist called Marius Muller (I can't be bothered to put the umlaut over the u so just imagine it) that is incredibly good.
Also the riff from Horslips' song Dearg Doom is catchy to the point of restarting the track four or five times just to listen to the intro