I just picked up a used Xbox, I'm looking forward to trying out AmigaSYS 3.
http://amigasys.extra.hu/eng/index.html
Be advised that the Worbench Installs like system 3 really need a graphics card EMU and 030/030 emulation to run smoooth...
On an xbox you'll be waiting for the icons to update quite a bit. AND the hires interlace screen flickers horribly, even on a HDTV screen, haven't figured out how to fix this.
I also have not seen an option for graphics card, flcker free video, on the XBOX version,
Recommend using 16 color WB, not 64 or 256 with copper backgrounds.
All in all the XBOX UAE experience is great, It runs original CD32 games too. The Media Center makes XBOX360 MCE look like a joke. I run the xbox 360 skin in 1080i, really great.
Can't wait to have BOTH on my LCD TV.