If you really want to have fun and you have some stand alone windows boxes set up Samba to be an NT domain controller..
I have a wireless network. I have an XP based desktop and an XP based laptop - I'll be adding my Mandriva box to that wireless network (finding a wireless card that is certified by Mandriva has proven a pain).
I would like to use my Mandriva box as a workstation, test server, and file server, as my two XP boxes aren't on speaking terms.
I'm also putting an Nvidia 6600 GT based graphics card so I can play games on the Mandriva station as well.
Regards, Ivan