I had the same thing happen to me a couple of days ago when I did the upgrade.

My old gnome2 desktop was set up so that I almost never had to use the mouse. I used gnome-do for application launching (excellent software!) and various compiz plugins for window placement with the keyboard (dual monitor setup).

I gave unity a try when I upgraded to 11.04, but it felt so "unfinished" back then that I figured it would take at least a year for me to give it any serious consideration. And it lacked all the configuration required to get to a mouseless setup. And it still does.

Oh, and it made X really sluggish and I've had at least one compiz crash every day since I upgraded (the ui crashes and reloads, putting all windows in the top left workspace).