The old Xbox dashboard.

A little annoying to navigate, but cool looking.
The new Xbox dashboard.

All Apple style clean floating pictures and reflections, laid out like the PS3 menu, with a childish looking Mii staring back at you.
On the plus side, you can do stuff like make the guy angry by shaking his head, dizzy by rotating the pad, and if you pull up and down in the right way in a close up view you can smash his little head against the screen.