This looks cluttered.

I'd suggest layout similar to fmylife.com. You don't need to require an account for people to use. Allow commenting, only those logged in can comment ? (Just thinking as I type).

I'm wondering if this would be more interesting if users generally had a more playful tone. "Trying to finish studying, but 30rock is too addicting!"

This comes close to a more specific twitter though, but similar sites exist (thathigh.com, fmylife.com, probably more).

Take all of this with a grain of salt. I am just typing whatever comes to mind.