Is the HTC Battery widget in fact a battery hog? I've got all my settings tweeked the way they were with 1.5 and I'm still getting sub-par battery performance...
Also on a side note, I noticed that when I first installed 2.1 after completing the process, Windows notified me that the program may not have installed correctly, I in all my excitement to get to play with 2.1 ignored this notification...end result serious lag in almost every task brought up, from the program drawer to the keyboard.... Finally I got so freaking frustrated that I went back reinstalled 2.1, waited for windows to give me the notification, and then re-reinstalled 2.1 one using Window's recommendations. Long story short...serious, I'm talking serious improvement in performance! Almost no noticeable lag anywhere, with the exception being the landscape keyboard, thats the same as it was on 1.5.
For those that are having issues, and did get the notification similar to the one I was giving, just for shiggles try reinstalling 2.1, it might make a world of difference ;-)