Stock Android on Nexus One? Is there a good place that documents how to compile Android from source and put it on Nexus One? For instance, I would like to checkout the source files of Froyo from the official repository and put it on my Nexus One... Any suggestions?
I believe this XDA forum post will give you a good head start.  Note: this is written for the Sapphire.

Compiling and flashing a Kernel for the N1.

Another guide from XDA forums.

Compiling systems apps.