Since Boot 2 Gecko is up and running on the SGS II, I'm wondering what it would take to get it running on the Nexus S? In my opinion, more operating systems = win.
You won't need to do anything but install it. Mozilla has stated that anyone with an Android phone and an unlocked bootloader will be able to install Boot2Gecko.
I think you are now able to do it, the current version I recently got form git has a config file for the Nexus s 4g.
You probably can Build it, just use the Instructions from Mozilla.
The file I saw is /B2G/config/kernel-nexuss4g.
I hope it helps
I'm pretty sure the b2g team is planning on getting it on every phone available. The only problem is the basic porting and the installing, which i'm sure they will try to build an easier way to flash if for us.