Yep. And in Return of the Jedi Admiral Ackbar, a character with a head that is rather fish-like, is a member of the Mon Calamari species? Either Lucas has been screwing with us the whole time, he thought he was being funny, or he was just lazy. :lol
From what I've read, it was Lucas' and Rick McCallum's daughters. Allegedly the band members were indeed filmed as extras in two scenes for Attack of the Clones, but ultimately those scenes weren't used...maybe; there's a brief shot in the Geonosis battle showing a heavy-set Jedi with a blue lightsaber who may or may not be Joey Fatone.