To answer a couple of questions/comments I have seen posted so far...
1. Home++, GDE, and 91Panda ALL work with 2.1. They do not, however, retain the new app menu from 2.1. It will be the same plain-jane app menu you see now.
2. gps works. Everyone is hearing the rumors, but no one that tries it has confirmed them. It seems to be working for everyone.
3. the eri banner on this build doesn't say "Verizon Wireless". it says "T-CDMA 64". There is a fix for this.
4. The backlight issue for the keyboard has a patch available, but it still doesn't function as it should. As of this post, the only patch available will leave the backlight on all the time. They are working on it.
5. They have the animated wallpaper working. Earlier today the patch for this was causing the 3.5mm headset jack to stop outputting audio, but this has been fixed now as well.
6. No, corporate Calendar doesn't come on the ROM. Yes, there is a fix to get it on there.
7. Using the return button to get back to your home screen rather than using the home button causes a momentary issue where you cannot switch to another home screen. As of this post, there is no patch for it.
8. the LED for third party apps does not function. Again, as of this post, there is no patch that I know of. Yes, the LED works with default android apps.
9. Yes there is an issue with some paid apps in market not showing up. The only one I had problems with was "Weatherbug Elite", but there are others. "Weather Widget - Donate" works just fine for me.
10. Certain apps are not yet usable on 2.1. "Root Explorer" is the only one in my collection that does not.
11. When you change your wallpaper, your app menu text will become offset. Don't panic... rebooting your phone solves this. Yes, it will happen every time you change your wallpaper. No, there is not yet a fix that I know of for the issue.
Did I miss anything?