Craig Loxton's Tech Blog is worth keeping an eye on, partly because he's in the middle of a transition from the Nokia E90 to the E51, and partly because he's just discovered an unofficial way to get Blackberry Connect working on the E51 - and it's a lot, lot faster.
if you follow that link for nokia e90, there is one interesting thing,
they have given a bb client for nokia e90 with firmware version 200.34.73
i wonder when they will make this available for open downloads, and what
changes they have made...hope FL3 is inbuilt