I like the name BB for the reasons Dante mentioned.

Sometimes I think my username is kind of lame, but I get the impression other people here don't really think of the book when they see me post, but just think of "Catcher" me, the person, if that makes any sense.

And of course if one googles my nick, they still get a whole bunch of entries about the book :)

Anyway, I vote for keeping BB!