I've been experiencing to many disconnects using this firmware and have found myself often resetting the power to regain connectivity. I'm still in the default settings or the state after a fresh install and haven't made any changes thus far.
I'm a bit disappointed but have decided not to continue with DDWRT. I do have other routers I could try but out of frustration, I ended up buying a Cisco ASA 5505 with a pretty mean license and am moving in that direction.