Fastr is a game that uses flickr images. It loads ten images that all share a common tag, one by one, and you guess what the tag is. When you guess right, the tag will turn blue. Then you can watch the pictures until the next set begins. The faster you guess, the more points you get. The points are reset every five minutes. Don't forget to enter a player name.
I found this one to be a bit trickier than the Google game - there were a few selections where I couldn't guess the tag at all though once it was revealed it was obvious so I'll put it down to being too early. Or something. ;)