Hi,
regarding the controversy whether kramer is the first or the last name, i remember an episode where Jerry showed kramer a triangle and then kramer said that if he had a son he'd name him "Isoceles Kramer".
This stands to show that Kramer is the last name not the first name.
Hope this helps.
Personally i don't think we'll find out kramer's first name tonite, i believe that only the charaters will hear it but we won't.
Arrin