is there any such thing?

user just bought his own personal BB...(no enterprise server, here).
Asked me to sync it up w/ our gw mail. (6.5.6). Seems it isn't
really an "imap" mail only collects new messages, doesn't
"sync" anything...very limited functionality, not much for
configuration options, and it doesn't even connect directly to the gw goes through the providers server. polling frequency is
set by them. (TMobile).

I've set up Chattermail for a couple of Treo users, and it works great! there anything similar that'll run on the BB?