The Nes Emulator for the Xbox 360 made with XNA has been updated, heres whats new:

Rom Loading Menu - Contributed by Thomas Aylesworth
Font classes from XNA Extras by Gary Kacmarcik at
http://blogs.msdn.com/garykac/articles/749188.aspx

Several bug fixes by Kerry McCullough

New logo designed by Matt Turnbull

Windows executables are now included in the release. No need
to compile it yourself to run on windows.

New mailing list setup for dev talk at
http://groups.google.com/group/xnasharpnes

More Info