Sprint Nexus S 4G is pretty much official...

[jedicide]

So you've seen the Engadget post already?
Well, Google has also made it official too on Nexus site and their blog -

Nexus S ? The new Android phone from Google

Introducing Nexus S 4G for Sprint - Official Google Mobile Blog

-via Twitter

 

[Phil Nickinson]

... Or the Android Central post.

http://www.androidcentral.com/sprint-nexus-s-4g-available-spring-199-contract

Or the Nexus S 4G forums ... :-/

http://forum.androidcentral.com/sprint-nexus-s-4g/