andrew307: Nice, i think you'll like it! I didn't do anything special, I just installed the Live .iso from a unetbootin prepared usb in the regular ol' fashion way.
If you're wanting to try wireless (which you'll need to be within 20 uninterrupted feet from the router it seems like) you'll need to learn how to enable wireless through command terminal, which isn't too difficult.
I only had two real obstacles initially. First, learning where all the settings were in the bios... it was a bit too difficult to boot from usb in my opinion, i don't remember what I changed, but initially booting from usb wasn't an option in the boot priority list. You may also have to change some settings within XBMC to get audio over hdmi to work, but nothing too difficult. All in all it probably took me 3 hours to set up the dual boot, and get XBMC running the way i wanted it, on my first try. I think I could do it significantly faster now though (45 mins?)
actionfreak: I'm not really all that great with hardware... this is why I didn't buy a bare bones system. However, if you can find a card that fits the case I don't think it should be a problem, on the other hand, a user, fishoil, on the Linux/Live forums, suggested this, and said it worked for him: http://www.newegg.com/Product/Product.as...6833130066