We will be having a Memcached Hackathon next tuesday the 15th, starting at 8:30. We have commandeered a BOF at the MySQL User's Conference and will be running the hackathon till late.
Current topics of interest:
Binary protocol for libmemcached
Storage Interface from Toru Maesaka
Discussions on #memcached on Freenode to set other agenda items.
BTW You do not need to be registered at the conference to come.