Two posthumous BSBdG's go out today to the great Frank Zappa, who would have been 63 today. Favorite album: 1974's Apostrophe('). I have a distinct preference for his pre-1977 work, but there is a lot of worthwhile music in his 80s and early 90s output as well. Either way, it is my considered opinion that he was truly one of the Great American Composers.
Also, today would have been the 57th birthday of the late Carl Wilson, who contributed so much to a lot of the best Beach Boys music. If nothing else, his place in Pop Music Valhalla is assured for his angelic vocal on "God Only Knows", one of the lovliest songs ever written.