An updated version of the Blackberry Client 5.249 is availabe at :
http://nokia-asia.com/nokia/0,,80370,00.html
I have downloaded and it works fine. I yet donot know what the refinements are but I am working on it.
The minimum firmware needs to be 5.22(1) which I just upgraded to about 4months ago. They have now come up with 5.22(7).😡