From my friends at SLCN.tv:
SLindy Hop is a Second Life couples' dance animation by Maar Auer. It was released July 2008 in SLCN.TV's Live Tonight Show by Paisley Beebe. You can watch the entire episode here. This is just a cut from that show, showing only the SLindy Hop. Dancer's outfits were generously sponsored by Cartunno Couture (the red flapper dress by Patrick Rotunno on Yolanda) and Artillery (all the 50's outfits).
I know, this is old, but I just found out about it from my friend Rhiannon.
The dance is available for purchase in Metaversal Arts, Cherish sim. Enjoy!