Actually, iDisk is supposed to work with Windows- at least with XP.
From Apple's site:
The cross-platform advantage
In addition to the Mac platform, you can also open your iDisk using Microsoft Windows XP, Windows 2000 or Windows 98. As a result you can use the Documents folder in your iDisk, for instance, for files you need to touch at both work and home or when you don't have access to a Mac. For added convenience there's even a downloadable iDisk Utility for Windows XP that makes opening your iDisk on a Windows XP machine especially quick and easy.
However, I had trouble with that program in XP and ended up giving up.
Squire
<edit> By the way, I totally agree with your suggestions, especially the additional email addresses.