[mhd]

For Common Lisp, the web server of choice would probably be Hunchentoot[1]. If you're using it directly, that would be similar to some of the more lightweight frameworks from other languages (Sinatra, Flask etc.). If you're looking for a bigger framework, Weblocks[2] could be of interest. Haven't worked with it myself, though. It does use Parenscript[3], which is a pretty neat way of writing JavaScript without dropping down to C syntax.

Common Lisp has pretty good support regarding books, libraries and developer mindshare in the Lisp community (which generally is quite fractured, albeit not on a Forth level). They can be pretty harsh at times, though.

Personally, I'd recommend going with some simple examples. Getting to grips with the language, the environment (probably Emacs+Slime) and a somewhat novel web framework at once can be pretty daunting. So taking baby steps on the result level, i.e. making stuff that could've been done with CGIs, won't heap yet another helping of novelties on your plate.

[1]: http://weitz.de/hunchentoot/

[2]: http://common-lisp.net/project/cl-weblocks/

[3]: http://common-lisp.net/project/parenscript/