Off the top of my head, for single player:
Super Mario Kart
Fallout 1/2
Tony Hawk Pro Skater 3
NHL 94
NFL Blitz 2000
Madden 2001
So the winner is probably Tetris!
Mulitplayer:
Diablo 2
WoW has about 150 days worth ...
I said the same thing, i'm getting somewhere with the Farnell page, though!
It also looks like Farnell will be selling a Model A bundle and a R PI accessory bundle in the future.