Perhaps you have head of this peg tossing, pinball-like game.
Some people seem to be addicted to it. Others not so much.
For the Month of March PopCap is selling Peggle for a mere $5 on PC and Mac.
This deal is good until 3/31 so if you were too cheap to buy it for $20 now you really have no excuse not to at least try it.
The demo lets you play for 1 hour so you can get a pretty good idea what it is all about.