My one criticism is that the docs are always slightly out of date. I would love more flexibility in the queries i.e. being able to do advanced queries on multiple collections, rather than having to resort to raw SQL. It'll get there I'm sure.
It's embarrassingly barren right now, mainly since I've encountered some big problems with getting my DNA quantifier out of storage to start doing a lot more experiments. I'm getting that on Tuesday, so will be updating site then.
This is a great post!