I know after the responses we received about the 3rd party email alternatives for BlackBerry devices that many people seem to be interested in them. LogicMail is one of the more popular option and Josep just tipped me off to a new version 0.3.2 that was just released. There is no official changelog but knowing the developer it hopefully addresses reliability and compatibility issues. I am hoping that the new version is faster than previous revisions.
I find LogicMail very useful for getting copies of emails that I have filed away into other folders in my IMAP account. This helps because my BlackBerry is set to automatically remove emails over 30 days old because otherwise I would run out of space. Check out the new version of LogicMail at this link. Or read more about LogicMail at the project website. OTA installations are available at this link.