Yeah, it would be a cool project. Fossil, his source control and ticket manager looks interesting as well. I don't think I would use it, with git so intrenched, but the way it shows diffs on tickets is really nice.
Actually the story of SQLite has been told numerous times, but each iteration fills in more of the details. Dr. Hipp is a personal hero of mine. If you're interested in learning more about the genesis of this amazing software, this podcast is well worth a listen.
Fantastic news! An email server that would be as robust, self-contained, and simple as SQLite...