I'm doing some similar work. It's nice to see group efforts here. I'm looking for a way to make a wider-spread effort, since I'm no bigger than a sardine at best. I'd like to get something going where we can "employ" people to scout out the spam comments, similar to what steamcleaners does.
Not sure if you're interested, but I'm tossing some ideas around...Here are the two posts I have currently:
Don't be Spam! Lesson on how to earn good reputation
Let me know if these are compatible with what you are trying to do, and maybe we can get together.