Merb is fresh. I find it carries a lot less baggage with it than Rails. Even better, the project is still small and I seem to get along quite well with the the other developers on the project.
I really enjoy helping projects push through to release and I was glad to be a part of that for Merb.
Sequel is a really wonderful tool, and I was finding that just not that many people in the Merb community were using it. I had a lot of experience with getting Merb and Sequel to work with each other, and figured I should share my experience with everyone else.