I don't know in which section I need to post this, so that's why I post it in this section.
You can download somthing like ''Windows 7 Frienlist Sidebar Gadget.
That contains you've a gadget on your desktop (on the right), than enter your Gamertag and then it will display all of your friends.
But I've download it, but it doesn't work.
Can anyone help me find one that works?