This is just my list. Some stuff like Citrix and GoToMeeting can be frozen as well. I heard all the social stuff can be frozen, I didn't because I use that instead of having facebook's horrid app on my phone. I didn't because I use that stuff. But this list should be a good starting point for you guys. Now notice I said FREEZE, NOT UNINSTALL. If you uninstall stuff, you're on your own.
backup assistant client
device statistics service
home screen tips
motorola dock service
ms exchange service
my verizon mobile
suggestions core rulechecker service
suggestions poll scheduler service
task manager (this gave me a force close loop, fine on reboot though)
ALL V cast garbage
And yes I have noticed speed and RAM handling improvements. For instance, I can actually come out of the camera app (I use LauncherPro, don't know about stock launcher) without a redraw or other weirdness. Every now and again it will redraw after 2+ days of use, but a reboot fixes this.
Good luck guys.