Good, please provide feedback on the Better Manual on its thread.

You can get the USB drivers from the link in there, or in here.
Good choice on the stereo Bluetooth. While the Xenon has the convenient feature of playing music even through non-A2DP (standard) headsets, the sound quality on A2DP (Bluetooth music) is much better.
While you can't replace the built-in browser entirely, you can install some good alternatives.
I posted some JAD files to download Opera Mini and Bolt in Landscape orientation, along with Google Maps. They're in the
Tips & Tricks section here.
Not sure on the email front. I use Gmail, though the newest (v2.0.6) isn't signed as far as I know, so it prompts on send/receive. I also posted a landscape Gmail in the
Tips & Tricks section.
The only tip I can give you on the Music Player is that it does support embedded artwork, so if you have embedded album covers on your music files, they will show up. I spent 2 days going through my entire library with Media Monkey to fix tags and embed artwork.
Media Monkey is a great tool.
Brandon