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1. BIS 2.5 will allow Hotmail now. While Hotmail is not the most dependable email on the Blackberry, you can follow the link here to perform the upgrade. How to enable HTML email on your BlackBerry
While that article focuses on enabling HTML on your BB, it will also get Hotmail to work.
For a Hotmail Plus link... I googled it, and this was my first choice: Windows Live Hotmail Plus