I believe there actually is a Tales from the Mos Eisley Cantina-style short story collection based around the denizens of Maz’s bar on the way. I don’t feel strongly one way or the other about it.
That actually makes perfect sense to me. I don’t mind the idea, but I’m skeptical about the writing.
Some of the already existing backstories to those characters seem kinda weird and silly.
(The Crimson Corsair is a pretty cool name though, has a bit of an early Marvel SW comics feel to it.)
Also, are the “Tales…” stories still canon?
EDIT:
I assume that you were talking about this?; http://starwars.wikia.com/wiki/Tales_From_a_Galaxy_Far,_Far_Away_Volume_I:_Aliens