Eric Idle (of Monty Python fame) has been talking about writing a show for Broadway called “Spamalot.” “But opposition to “Spamalot” has come from an unexpected quarter: Plans are also afoot for a revival of the classic Lerner and Loewe musical “Camelot” on Broadway that same season. Those producers aren’t keen to share even part of their title. Recently, an attorney from “Camelot’s” production team faxed a note to the Monty Python people suggesting that since “Camelot” got there first (it was originally produced in 1961, while “Holy Grail” was released in 1975), perhaps the “Spam” folks should consider changing the moniker of their production.”