I was wondering why this guy's github account sounded familiar - he's the yasnippet guy (if you're an emacs user, it's worth checking out yasnippet). Good stuff:

https://github.com/capitaomorte/yasnippet

He's also the guy who mantains hunchensocket, bringing WebSockets to CL. Love his work!

https://github.com/capitaomorte/hunchensocket

Sylvester the Cat is connected to Lisp how?

Ah, right: the character speaks with an extreme lisp with his tongue sticking out and spraying:

"Th-uffering Th-uccotash!"

Gotcha.

My understanding was that Sly sounds like Slime, but isn't.

Figlet sighting. Font: slant. :-)