Despite the official move, people keep coming here to the tune of 40 a week. Not too shabby, huh?
FlOw is one of my favorite games to relax with and I downloaded it to my PSP a while ago for constant fun. Lately, I've been using it to help me get to sleep. I've been developing the typical sleeping problems associated with pregnancy and found that a half hour of flOw will knock me out like a light.
The link above takes you to the original flOw. I recommend giving it a shot and seeing what you think. The online version is easier to control than the PSP, but you also have more room. Put on the headphones and veg out for a while.