So far the only draw back to using Kubuntu is that OpenOffice ODS files will not open correctly in Microsoft Excel.
BUT other than that it's been great. I've done some pretty neat stuff with my desktop. I've sparked some interest of my co-workers recently and I'm burning them a copy of Ubuntu 9.04 LiveCD so they can give it a go.
Its quite amusing because when I tell people I use Ubuntu Linux they look at me like I'm crazy. As if it was not possible to run anything but Windows and MacOS. Strangely enough I've gotten better fps on WoW running it from WINE 1.1.19 under Ubuntu 8.10 than I ever did in Windows XP.
These forums are truly Epic beyond belief (just like google).
Now if I could only figure out how to make my parent's Windows XP SP3 desktop stop crashing on Shutdown cause that auto-restart is killing me and I never hear the end of it. I wish I could switch them to Ubuntu =(