>... Enter should read data entry form, esc should close it. It's much faster to run with tab from field to field then to use a mouse.

We use "Enter" for move and "F2" for save, "Esc" for close. Our customers don't like use "Tab" for move.

>But I'm on a minority.
>AFAIK only 3% of all users realy use keyboard and keyboard shortcuts for navigation.

No. Our users like use keyboard. Expecially Old MS-DOS users like use keyboard.