Indeed. Matt (the author of cr-sqlite) and I have discussed the differences and similarities in our approaches. cr-sqlite is based on triggers, which allows all the code to be encapsulated in the DB (although the network layer is still needed to send/receive patches); my approach provides tight integration with the rest of the fullmoon framework relying on its network support and message processing.
https://github.com/vlcn-io/cr-sqlite/