Ever since the Nexus One build became available, hackers have started tearing the OS up from top to bottom, trying to suck anything useful out of it they possibly can. The latest results are screenshots of the homescreen and directories that include the default wallpaper and default ringtones found on the vanilla version.
First here are the homescreens (translated from mobiflip):
The folks at AndroidSpin devoured the Wallpaper and Ringtones which you can download here:
Enjoy! Thanks Dadeboe!