There is a guy named Tim Kliphouse (Kliphuis...dutch I think), who captures the Hot Club Grappelli style very well. He performs with various gypsy jazz players (and sometimes in other contexts as well, I believe). I have him on Fapy Lafertin's recent cd "Fine and Dandy" which is magnificent. Fapy is an amazing Django style player, who also brings his own styleto it as well. I highly recommend this cd for a modern day sample of the classic Hot Club sound.
I think Tim is coming to Birdland NYC this fall as part of their Django tribute. I wish Fapy would venture over here as well.