Sooo, the Nexus S is cutting out mid call eh? 
Are the owners sure they are holding it right?!!!!!
(runs and hides!)
But in all seriousness, I'd imagine Google are simply holding back the update until they are sure that the issue has been remedied/proven to be a Samsung issue (ie hardware).
When they are ready to roll it out they will, and we'll still be among the first devices to get it, until then I decided to pass the time by trying out another ROM since I restored back to stock back in October/November in anticipation for Gingerbread!

Are the owners sure they are holding it right?!!!!!

(runs and hides!)
But in all seriousness, I'd imagine Google are simply holding back the update until they are sure that the issue has been remedied/proven to be a Samsung issue (ie hardware).
When they are ready to roll it out they will, and we'll still be among the first devices to get it, until then I decided to pass the time by trying out another ROM since I restored back to stock back in October/November in anticipation for Gingerbread!