Great. I have just discovered another time-sink of a website: www.helium.com. It's a website for writers to read, write, and rate articles on hundreds of topics.
I can't vouch for whether it's really any good or not, because I've only just discovered it today. I'm guessing you don't really make much money on it, and the writing quality on many of the pieces I read today was pretty bad. Some were pretty good, though.
Nevertheless, I have already sunk two hours of time into it, both writing and reading articles. I'll keep you posted.