Basically, iSketch is an online drawing game where there are various rooms you can go in and play. There will be a number of players in there and each gets to draw each round and the other players have to guess what it is ... sounds not so good but it's a great game, quite addictive too.
I have set up a room in there called ''TiBB'' so go online and go in as your TiBB username and go into the ''TiBB'' room which is near the bottom of the list. You might get some people who aren't from TiBB in but that doesn't matter.
It is
www.isketch.net
You don't need a password, just put your username in ... it's easy enough to pick up and it's a good game.
Also, I think when I go off, so does the room but you can create a room anytime so you can just keep re-creating them.