Zune Thoughts: New Zunes Cometh My Way....Today?

Being a Zune MVP is paying dividends this week: I've been told that I'm getting sent a new Flash-based Zune (not sure if it's a Zune 4 or a Zune 8) and a Zune 80 as well. These are review units, with the review embargo being lifted on November 13th. That means I won't be able to post pictures or comments about the new Zunes until the 13th - but it also means that I have a decent amount of time to spend with the new units, unlike my incomplete rush-review last year. So here's your opportunity Zune Thoughts readers: what would you like me to check for you with the new Zunes? What would you like me to test?