Pogo.com is a gaming site which is mainly aimed at US residents as many of the games have cash prizes but cant be won unless you are american.
There is a hugh variety of games for all ages and chat facilities are used in most of the so you can chat to people you are playing against or are in the same gaming room as you.
The downloading is slow but the wait is worth it, some games have breaks after a certain amount of time which is annoying especially if your enjoying the game alot.
Overall a great site which can be used by anyone around the world although prizes are restricted, this is definitely a site to go to if you want to kill some time.