The guy wants to get IMAP email.
I'm not ever going to recommend someone jump through that many hoops and pay that many people that much money in order to read email.
You're using unreleased software on a device and that is supposed to solve someone elses' problems? Do you see why I'd recommend someone spend their money elsewhere if they want to use IMAP for a reason they didn't give?
In my opinion, you would have to be pretty hard up for using a RIM device to use a Bberry to read Hotmail or an IMAP account when there are no fewer than 15 devices that will arguably do the job much better.
The only real benefit of the Bberry is "push". Any Series 60 Symbian device will attach to an IMAP inbox and show you when a new message comes in like the original poster described.
Series 60 doesn't allow for multiple folders however, not remotely at any rate.

Nokia has added Blackberry connecto to Series 40 and Series 80, only a matter of time I suppose before Series 60 and Series 90 get it.