SQLite JS API
I've generally gotten the impression that the SQLite features were somewhat like jWeb or the inspectors, in that they are in there and work, but Cycling74 decided not to publicize them much (possibly because they weren't really ready to support them fully).
This may not be the case (and I'd be thrilled), but it's been my theory thus far.
If I'm wrong about this, I definitely want to find out, especially if the SQLite in Max is accessible from the C API.