Problem: you have a cool idea for a niche blog, but not the time or energy to keep it updated.
Solution: Collectivize it, post it here, and watch your blog grow while all you need to do is review and possibly edit submissions

By collectivizing I simply mean making it possible for readers to submit something. How you do this is up to you, but you can find some instructions here.

Another problem this site may help solve is lack of traffic to your blog or website. Here you can find blogs that take in submissions and reward you with an incoming link. The first possibility to contribute is this site. Post a site that fits the definition of a collectivized blog and get linked. This might not seem too rewarding right not but it may prove to be worth your while since this site is likely to get picked up by some of the billions of “how to get links to your blog” sites.