NicheRead.com (domain available)

"Recommended reading for every niche"

The premise: Share reading recommendations, whether it's blog posts, news articles, books, or whatever.

Create a flexible (wiki-like?) directory where users can create their own niche groups and share their reading with each other.

Within each category is a discussion board-like engine.  The most recommended are at the top but new ones have a chance of being seen.

Shelfari already does something like this for books.  They allow for creating groups, but there doesn't seem to be a whole lot of structure to it.

I am always looking for good reading on esoteric topics.  If something like this were popular, I could go and find relevant blogs, books, and articles.