The 2.3 update seems good so far; and the new "remote learning" feature is great! It's buried in Settings \ General \ Remotes \ Learn Remote.

Finally you can ditch that annoying tiny remote, and use your DVR remote (or any other) with AppleTV. After learning the basic functions (the up/down/left/right and play-pause and menu--the ones on the apple remote), there's 9 more functions it'll learn: play, stop, pause, FF, REW, Skip back, Skip forward, and Chapter up & down.

Makes the AppleTV MUCH easier to control and less clutter on the coffee table.

[With the standard TimeWarner DVR remote, it took a few tries in programming its AUX button to be a DVD player that actually sent out a signal for the Skip-back button... the one that worked best is a virtual Sharp DVD player; only the blue "menu" button didn't work so I used the grey "exit" button. It's code 252 for the remote -- UR5-8400.]