Can anyone tell me what they are doing for PM capabilities on their CB / PHPBB sites?

I'm still using the native phpbb PM system and looking for a better, more integrated PM solution. Most of my sites users stay in PHPBB, so whatever I choose i'll need it to integrate tightly into phpbb.

Thanks in advance
Stewart

cbconnector.com uses the built=in phpbb PM system... not integrated together yet though... (that is down a bit on my todo list)

Greg