Yoshihiro released a Genesis/Megadrive emulator for homebrew 360:
[QUOTE]
Genesis360 Alpha Release By Yoshihiro For XBOX360

Quick and simple Port from PC to XDK to let you see what can be done without an official devkit .

100% Coded on Retail :=) No Need for donations at all

Plays all Genesis Games
all the roms go inside the genroms folder
full screen mode
Zip Gz support
Simple rom Browser
Sound support.
Pad setting to enable the 6 buttons paddle
4 player possible .

Buttons mapping :
360 Genesis
X = A
A = B
B = C
Y = X
LB = Y
RB = Z
LT = MODE
START = START
BACK = if you want to go back to the roms list while playing.

TODO :
Fix a small Bug
Add the VSP processor support for Virtua Racing

PS : It’s only an Alpha release
[/QUOTE]

Official Site: n/a, by Yoshihiro (thx to D-BlooD for the news)
Download: n/a (built with XDK)

Team XeDev released a new application for homebrew Xbox 360s:
[QUOTE]
Release Notes
Converts NXE installed games to Games on Demand

Install Notes
Copy your game(s) to your hard drive using NXE -] Run NXE2GOD -] All games
ripped using NXE will now be Games on Demand packages and not need the disc.
[/QUOTE]

Official Site: n/a, by Team XeDev
Download: n/a (built with XDK)
News-Source: xbins.org