Came across an open source project called XPDE http://www.xpde.com/ which may interest some of you looking for a desktop GUI that resembles Windows XP. The closest I've seen to this is with Linspire where they've modified the GUI of KDE to resemble Windows XP GUI. There's similar GUI goodies over at http://kde-look.org/ where if one so desires you can have the look of OSX GUI (see Baghira). For those interested in knowing who's using KDE and what version here you go http://www.kde.org/download/distributions.php
Cheers 