We too looked foreward to Lobster Night on the Norwegian Pearl last year, as my son LOVES lobster. Sadly, it was not edible.
(Honestly, if a cruise line is going to go through the expense of offering lobster, at least make sure its cooked properly)
Cant tell you which night lobster was served (dont remember) but I do remember it was a well guarded secret. We had to ask several times, and I do recall it was early in the cruise.