Loaded this on my 8800 last night. Works fine. Some differences I've noticed so far:

The recent places menu is a little different. I can't decide if thats good or bad.

Some of the audio samples for voice directions seem different too.

One last thing I noticed, which seems pretty annoying so far, is that "traffic optimized" is not the default option when selecting a destination. Instead it prompts me to choose traffic optimized, and has "fastest" as the default trip option.

Anyone else notice anything?