Installed NexusBeam 4.1.0 last night on my Nexus S. ICS is pretty fantastic so far.

Awesome

• Tiny interface tweaks like smooth fades
• Attractive spell check under-lining in most text input fields
• Screen orientation rotation effect (Thanks to iOS for forcing Android people to up their UI game)
• People app!
• “My Contact Card” concept in People app. I can’t believe this took so long
• Settings App sucks a lot less

Less Awesome

• Google Search bar at the top of the home screen. (I don’t really use this, but maybe I’ll have to start now)
• Horizontal scrolling through the apps drawer
• Once finished scrolling through the apps drawer you start scrolling through your widgets.
• Less battery life (but I’m using a brand new, probably untweaked, community build, so I’m not going to actually register this as a complaint yet)

It is hard to have any real opinion until I get a stock Google Rom and try it out, but for now I am very happy with ICS.

So, thanks to the devs over on xda-forums, I am up past 3am fiddling with the innards of my Nexus One. So far, I have installed the Chris Soyer Gingerbread build. It works, basically. I have no access to my address book or my Google Account. We’ll see where this goes in the next 24 hours. Gingerbread is a nice refresh of the Android UI, though. I don’t see any massive changes, but it looks good.