XeNTaX

Finally got around to added the promised sound and music exporting to the unpacker
https://dl.dropbox.com/u/17271122/fez/fez_parse_0.6.zip

You'll need to dig up a copy of either xmaencode.exe or xma2encode.exe to be able to convert the game soundeffects, and xwmaencode.exe for the music.

xwmaencode.exe is in the latest directx sdk download, while xmaencode.exe/xma2encode.exe are from the xbox 360 sdk
Though I'm sure a bit of googling or digging around on this forum will help with tracking down all three

And another new version, this time with a barebones ArtObject viewer as shown at http://imgur.com/a/xsFU0

https://dl.dropbox.com/u/17271122/fez/fez_parse_0.7.zip

The viewer runs off the xnb files directly rather than the exported pngs and xml files, so you can either run full_export.bat to do a normal export of everything, or only unpack the xnbs with
fez_unpack.bat Content\Essentials.pak out
fez_unpack.bat Content\Other.pak out
then show_ao.bat "out\art objects\new_hexao.xnb" to view stuff
everything in the art objects directory that ends with ao is a viewable art object, while the files without the ao suffix are just the textures for each

In the viewer you can left click and drag to rotate, right click and drag to zoom in and out, hit L to toggle lighting, T to toggle texturing, W to toggle wireframe overlay, C to toggle backface culling, or ESC to exit

its a bit my very first opengl programish but seems to work ok on my machine at least