A post like this seems like it should be on someone's personal 'blog and not Mefi...
Micro Advertising - a way to make niche internet publishing profitable?: "It's all about targeted micro buys of advertising space - the old principle of getting the right message in front of the right group of people. Buying 10,000 impressions of your message in front of a very targeted audience for a low fee. " Thomas has created a Yahoo group to hash out the issues further, if anyone's interested.
Blog of the Moment? Perhaps you could randomly cycle through the user database and highlight a blog every 10 minutes or so, like at the top of the sideblog. It may be a way to temper the urge to self-link.