Official Google hosted android firmware

This link:

http://android.clients.google.com/packages/ota/passion/81304b2de707.signed-passion-GRI40-from-FRG83G.81304b2d.zip

is reported by xda-devs

http://forum.xda-developers.com/showthread.php?t=965478

as being the Nexus 1 Gingerbread update.

in reference to: 404 Not Found (view on Google Sidewiki)