I've been playing around with the idea of learning a Lisp for a couple of weeks now (and dabbled with Clojure, SBCL, Chicken, Racket). But ultimately haven't had the time to really get into it.
Is there something like a web framework for it?
You should do a pull request for the web framework benchmark with Chicken Scheme to see how it compares against the others :)
It is still more bare bones compared to something like rails or django but we are continually improving it. It is very straightforward and easy to get started with, and it is already quite powerful. You can do most things in it as easy or sometimes even easier than in more popular frameworks. You do have less web-framework-specific libraries to work with though.
edit: awful can also be done with SXML which prevents XSS attacks be default.
As I stated already above: give newLISP (http://www.newlisp.org) a try, when You like "lisp-like" languages. There's already a web framework for it called Dragonfly (http://www.rundragonfly.com). I'm one of the developers of Dragonfly and using it for all my web applications.
Unless you're stuck in Windows, I suggest you take a look at PicoLisp, a very rich and interesting development system. The Wiki is of course written in PicoLisp: http://picolisp.com/
You should do a pull request for the web framework benchmark with Chicken Scheme to see how it compares against the others :)