I went to the Web 2.0 awards list and looked at several sites. I especially enjoyed Guess-the-Google http://grant.robinson.name/projects/guess-the-google. It was fun for me and on one game I broke 300. You know how in the language arts classroom you sometimes play Categories--I think this might be adaptable to that situation. I don't know though how appropriate the images would be. I know on the image wall in Bloglines there was a qualifier that photos possibly could be x-rated (my words not theirs) and sure enough one was on the wall I saw.
Also the One Sentence http://www.onesentence.org/ appealed to the writer side of me.
And 43 Things http://www.43things.com/ was fun to read.
Thank goodness this blogspot saves as a draft if you click off of it by accident. I momentarily thought I was going to have to type all of this over.
I visited the Library Thing http://www.librarything.com/ and decided I would rather be reading than fooling around with it.