Originally Posted by smoked_toast

Yes- after applying the 2.1 update - specifically bluetooth has improved for me in the following ways:

• When playing music from my phone over my car stereo, the sound used to suffer from weird pitch and tempo changes, which made the music sound TERRIBLE. There were also small gaps of silence. All of that is now fixed and audio over bluetooth works perfectly.
• Connectivity to my car stereo is automatic now. I used to have issues with my phone not auto-connecting wheneever the phone was in rage.
• Call quality over bluetooth is noticeably better for me as well.

With 1.5 my biggest complaint was the issues with bluetooth, which have all been fixed. Couldn't be happier.