It's a tad odd that Sprint is spreading the news before it's ready to talk pricing, but maybe it wanted to give a heads-up to its customers who craved a Nexus One before they jump to another carrier. And while the Moment and Hero may be nice phones, the Nexus One will easily be the sexiest Android device available for Sprint; for the moment, at least, Sprint is letting Google sell a Sprint phone that trumps the ones available in its own stores.
With the T-Mobile Nexus One, the new AT&T-compatible one, and Verizon and Sprint ones on the way, folks who want a Nexus One will be able to get ones that work on every major U.S. carrier. (AT&T customers will have to pay $529, since there's no subsidized version; I'm assuming that Verizon and Sprint customers will be able to get one cheap with a two-year contract, although I don't think that's official.)
For all the controversy over Google competing directly with its own partners, it's doing a good job of getting the Nexus One onto all the big U.S. networks. Given that the phone doesn't appear to be a blockbuster yet, maybe the rest of the industry has concluded that it doesn't need to fear the Googlephone after all...