From My Blog on July 31 2004: "Wondering who The Carl LaFong Trio is?"
There didn't seem to be an answer until now. Looks like Mr. LaFong, the leader of the trio that made the Song of the Day in that post, is also a director or producer of See You Next Wednesday, a ficticious movie advertised on a billboard almost an hour and a half into The Blues Brothers.
Well, I think everyone figured that the band's name was a gag or something on the soundtrack album for The Blues Brothers. It's actually really funny now that I saw that billboard. Nothing like a good inside joke.