not sure if it's a bit of the topic but i have just finished a online arcade here http://www.garysportal.co.uk/forums/1index.php
once you register you will find a arcade link at the top to play games.
the site is just a small test of mine its got a small forum on it and about 150 games in the arcade. you have to register because the arcade remembers your name for the high scores and the leaderboard.
don't think you will be dissapointed if anything it will kill a bit off your time at work i do nothing else thats why im number 1 on leaderboard.
let me know in the forum what you think about it and any ideas will be greatly recived