On twofifty.org, you can track which movies of the IMDb top 250 list you've seen. It's currently open for all in a closed beta width invites, of which I have 4 left to share. Send me your mail address and name, and I'll see what I can do for you.
By the way, twofifty.org was developed by Tim Broddin, which you might remember from the Nucleus Support Forum as JefPober or Sir_Psycho.
