http://www.mobilewhack.com/pda/black...g_the_bwc.html
That's what I had to say about it.
In short, it isn't an IMAP client. It will pull the mail, stuff it in the BBerry BWC inbox, and shove it at your 'Berry.
that's it!
So the above link is what I do in order to most effectively use my BlackBerry for my personal email.