Holy God, Microsoft just answered two of my biggest prayers. The latest upcoming backwards compatibility update for the Xbox 360 covers a round of half-decent titles, but also includes the A-List But Sadly Forgotten (And Thus Very Cheap) Champions of Awesome, Panzer Dragoon Orta and Jet Set Radio Future, thus bringing my list of Xbox games I can finally play on my 360 up to... uh, two. I can't say for certain whether or not that includes the JSRF/Sega GT bundle disc, but seeing as how the Xbox 360 compatibility list now includes both of those titles, it very well might.
The patch isn't available on Live just yet, but you can download and burn the patch manual-like if you just can't wait to update your 360 to play these games. The linked page says "August 2006 update", but the file is most certainly an April 2007 deal, so be not afraid.
Hit the jump for a full list of newly-compatible games.
Avatar: The Last Airbender