[false_apology]

Off the top of my head, here is what I can think of:
1. Enhanced "default lock screen" with slide function (like s2u2, but built into the OS)
2. Enhanced kinetic scrolling across (almost) all apps (with bounce back like the iphone!)
3. New "Finger Friendly" menus
4. "Honeycomb" start / launch menu, much better then the 6.1 start menu
5. CHome / titanium , new "Windows Default" UI. VERY customizable.
6. New "pocket IE 6". Supposed to compete with Opera/Safari, has zoom capability; can render complex full web pages, etc. (Kind of a letdown though, Opera is much much better still)

That's all I can think of. I agree it is much better then 6.1. And the cooked ROMs have so many options, it's fun to try them all.