I like this one cause the "sessions" are just a couple minutes each:
Google Image Labeler (http://images.google.com/imagelabeler/)

My best is 1000 so far...

My company is not pleased that you found this. :D
Work getting done slowly.

What's your bosses email address. I'll let him know you've got more important work to do.

Haha, I'm up to 1270 now :)

Registered or Guest?

Registered RickJ.

Hey, your boss will hear a lot of typing so probably assume you are hard at work :)

I finally made it to 780 and now I need to go take a nap.