Because I'm crazy, and was a little bored (my wife went to bed far too early for me...), I went ahead and installed the 2.0.1 update from the file in this thread.
I did this AFTER rooting using the rooted update.zip file distributed today.
It works, apparently flawlessly.
Version de micrologiciel: 2.0.1
GAS_EMEA_USASHLS00AZRTEMARA_P016
Version de bande de base: 3GSMEPU91A_U_91.08.15I
Version de la bande de base: UCASHLSEMEAB1B803F.0R
Version de noyau: 2.6.29-omap1 a21146@ca25rhe54 #1
Numéro de build: SHOLS_U2_01.15.0
The home screen is a thousand times smoother, the notification and apps drawers slide instead of bouncing.
No browser problems that I could find - it is fast and clean, and much smoother than 2.0. It automatically reformats text to the screen width when you rotate, and double-tap to zoom worked perfectly on 14 of 15 sites that I tried. The one where it didn't also confused my 3rd gen iPod touch.
All of the 2.1 stuff that I had installed still works. I have not tried the launcher yet (nor am I sure that I will).
Google Nav works in the APK I had installed while still on 2.0, I think.
All of the apps are still in the market. I still get French commentary and French-only apps, like SFR TV and FreeWifi still show up on top of my communications catagory (that's where I live), so using that Italian file doesn't seem to have screwed up my location. I'll test when I get something interesting to test.
The only thing that doesn't seem to work for me now is Voice Search. It can't connect to Google. I'll remove and reinstall and see if that fixes it.
The Superuser Whitelist application is still on the phone and still works, but I don't have any rooted apps, so I can't tell if they work or not. If someone wants me to test one, just point me in the right direction and I will do it.
Swype still works. Facebook with contact sync works. I took a US APK for that, so I'm not sure if this is a new version or not.
Anyway, this was really just to answer everyone's questions (including my own).