Apparently, someone accidentally (or craftily) "leaked" a Sprint web ad showing the Samsung Galaxy Nexus coming to Sprint's 4G LTE network sometime soon. The ad was not up for very long when it was quickly yanked off the web. Ironically, it will be the middle of this year before Sprint actually starts rolling out their 4G LTE network, but they may release their own version of the Galaxy Nexus long before that happens. The Sprint version is identical to the Verizon version with one notable exception beyond the different radios, and that is that the Sprint version will supposedly have a 1.5GHz processor instead of the current 1.2GHz in the Verizon version.
Sadly there was no real time-frame mentioned in the ad before it was pulled, so it is possible it could be quite some time. In the mean-time, Sprint customers will have to wait anxiously for any official confirmation of this.