Here are the rules: Go to the last three people who have posted their pictures and leave them five comments each. Then post either your entire photostream, one set, one collection, or 5 specific pictures... whatever you want commented. So everybody should be commenting fifteen pictures before they post theirs. I know that sounds like a lot, but it really isn't that hard - and it'll be worth it when you get your comments ; )
Obviously the first few people who post aren't going to be able to comment that many, so don't worry about that.
After you've gotten your fifteen comments, you can repost different pictures as many times as you like - as long as you keep commenting others.
Do those rules sound okay? Should I adjust anything?
Here are mine: Fendi - 12 years old - a set on Flickr