Mirriam Webster online offers wordgames

I use the Miriam Webster online dictionary often. Once upon a time they had some very interesting vocabulary-building word games on their site, that I accessed everyday while studying for the GREs. Recently they changed the types of games they offer. While not vocabulary-building games anymore, they are more animated, and actually more fun, than the previous games. You can log in and play their word game of the day (which obviously changes each day), or choose from a larger pool of word games. Its worth a visit and gets my wheels spinning when I've hit a mental or creative block:
http://www.m-w.com/game/more.htm