La Bebe's first word is "Go!" Go! means "I'm on the move!" and "I want that!"
She has also tried "car" doubtless because of all of the Matchbox vehicles strewn around our living room.
She also said "Boobah" when Bubba was watching it on TV yesterday. I tried getting her to say Bubba to call her brother, but she can't connect the two (He mostly goes by his Christian name around the house. I think I'm the only one who calls him Bubba.).
Aimee has a great post up right now about her baby girl's first words. It's much more well written than this one, so go read it.