The update rolling out today for the Samsung Nexus S 4G is a mix of good and bad it seems. Hopefully fixing some of the radio and connectivity woes more than a few are seeing with Sprint's first Googlephone, the latest OTA will also end the free tethering that Nexus S 4G owners have been enjoying. We've heard some rumblings of this across the web, but a confidential source from Sprint has confirmed with a bit of internal communication that the GRJ90 update does indeed stop tethering for those who have not opted in for the hotspot plan. This move shouldn't really surprise anyone, and those determined will easily find one of many work arounds, but it looks like "officially free tethering" is done for the Nexus S 4G. We've reached out to Sprint for confirmation, we'll update if they have anything to tell us. A screen shot of the communication is after the break.