First off I am going to post some of the "Zune Web-Sites" I like the most.
http://zunerama.com/ (This one Has one of the best "Zune Forums" out there!)
http://www.zunescene.com/ (This one Has great Information!)
http://www.zune.net/en-US/ (I think this is "The Official Zune Web-Site".)
Here are some Wallpaper and Case Links.:
http://www.zunescene.com/zune-wallpaper/ (This has great Wallpapers! Some are scary though...)
http://www.speckproducts.com/zune/index.html (If you REALLY want to Protect your "Zune" check out these "Cases From Speck"! Especcialy "The ToughSkin One" Im wating for mine to come in!)
http://amazon.com/gp/browse.html?node=283468011&/sr=53-1/qid=1172428750/ref=tr_311041/103-6453695-7409427 (Amazon.com Is Great For Things Like This!)
More Links coming soon, I am looking for "Wallpapers" so stay Tuned!