Not sure if MS will listen to me but my #1 request for the Zune/Argo is that it should support the Compact Framework.
I am very dissatissfied with the ipod, I mean the ipod in itself is the most closed system I have ever come across. You can not do anything with the content you store on the device other than what is in built. I do hope that Microsoft sees this shortcomming and makes the Zune a cool platform mobile content platform for which apps can be written for.
Technorati : Argo, Zune