I've been playing some gigs with a gypsy-jazz outfit, and I came across the playing of Marc-Michel Le Bevillon. Really nice stuff--excellent technique, and a really fine revision of the gypsy tradition, which, lets face it, is pretty confining for the bassist, at least on the old Django records. I found it pretty inspiring.
Here's an example--playing "danube" with Romane:
http://www.youtube.com/watch?v=_pBJ1NK90TM
He really lends the tune a great feel, more relaxed than the usual gypsy thing. He has a website, but it's all in french--
http://marcmichellebevillon.com/
A really excellent player who had been totally off my radar. I just found an album called "double Jeu" with Romane and Stochelo Rosenberg where he plays really beautifully.
Anybody know anything about him?