yah i spotted that in one of the other threads lol...where was it rumored from though? if it was from a sprint sales person i wouldnt hold much on that..especially since theyre not really supposed to say anything. if its from a side site like s4gru where they have lil birdies that leak them info then yah maybe..but even they will remind people that its only rumored and not nailed down date wise.
plus my very own receipt and e-mails form BBY state 18 may. of course that is no guarantee but the above link should give an idea as to where the 18th came from.
also the 18th is when the june 1st upgrade eligible folks can bump up their eligbility status (2weeks) to get the phone at 200..