Yeah there are BB connect clients for WM5 I was playing around with it on a demo HTC Jasjar (branded o2 xda exec). I got the download FOC from my carrier who provided the xda exec

Did I like it, not really. I mean the connect works well but the jasjar just sucks in terms of a device as its hopelessly low on memory, and everytime you press a button you wait 1 sec for a response. Plus the BB connect device connects via a BB APN for BB email, but then to web-browse you need to disconnect GPRS and then connect via the GPRS APN (mobile web in this case) in order to browse a website, messenger etc. this is an incredible PITA as if you then leave the GPRS APN Connected, you wont' getting any BB emails!!!

It's back to being quite a handy paperweight (something it's well equipped for) and I'm back to using my trusty 8700 which just rocks..

to give bb connect it's due it works well on SE p910i, 990i, W600i and the NokE61 but those don't run windoze..

bb