From blogs.cars.com : 

[...]

Hit the little button with a talking face icon and say “play all” and you get a shuffle of all your songs. I wasn’t starting that easy. As I hit the roads leading to the freeway, I started playing a little game I made up called “Stump Sync,” which included picking artist names it couldn’t possibly figure out. Queens of the Stone Age? Not a problem. Pretty Girls Make Graves? Right away. Dozer? Yessirree. Dinosaur Jr? I’m not sure if it knew the abbreviation, but it came up. The only two artists — out of a few dozen I tried — it got tripped up on were Enon and Fugazi. When I said “play Enon” — pronounced ee-nuhn — it couldn’t find it. But it then said, “Say 1 after the beep if you mean: Fugazi. Say 2 after the beep if you mean Enon” but it pronounced it een-an. This thing is pretty slick.

My only problem was remembering album and song titles. When a song is playing, it’s easy to say, “Oh, I love this song.” When you have to think of the song beforehand by proper name, it’s not so easy. Same with album titles. So I stuck to artists and eventually just resorted to how I normally listen to my Zune: Shuffle all.

[...]

I'm not sure which is the best Car Dock to choose for your Zune, but I know which is the best car-company to choose if you are Zune-Passioned!

Links:
SYNC website
Ford Focus 2008 website

Related articles:
Ford announces SYNC will cost $395 (watch some promotional videos)
CES 2007: Gates keynote edited for Zune (SYNC announcement)
Ford and Zune  (Official Press Release)