I already know Scheme (read SICP, took the class, got an A, wrote a logo interpreter in Scheme, wrote a Scheme interpreter in Python, etc.) but I haven't touched it much in two years. It seems to be great for computation, and I can certainly see where it would be a perfect fit for artificial intelligence, but I can't imagine using it for applications or even simple scripts.
So tell me /prog/, what Lisp dialect should I learn or at least what are the pros and cons of each?
Some of the Scheme's are huge library-wise, quite ``practical'', and more importantly have active communities (Racket and Chicken comes to mind). CLers have been using the ``Scheme is small, also, a toy'' meme for decades, perhaps from a former truth that most Schemes were strictly one-off research things. I assume the larger Schemes got rid of the Scheme name because of this lingering perception. R6RS underlines a schism of varied purposes that morphed the report into an attempt akin to ANSI Common Lisp-1. Things like Clojure, newLISP and whatever else get attention more easily because they are perceived to reside at the ``top node'' of the Lisp hierarchy, where the hierarchy being CL, Scheme, and everything else.