I know that LISP is a pretty old programming language... I am interested in learing it.... however I would like to know if it is still used... and if so what for... THANX

It's Lisp, not LISP (it was originally LISP but Lisp looked better so...). Lisp itself is not longer used (if you mean Lisp 1.5), but many dialects are (e.g. Common-Lisp and Scheme). When most people say Lisp they mean Common-Lisp, since it is, well the Common Lisp implementation (users of many different Lisp systems influenced its design). I personally don't like Common-Lisp much and prefer Scheme because it has more syntatic regularity. Scheme is mostly used for academic purposes (e.g. first semester programming course), but has a few other uses (using mod_guile I'm working on writing a set of modules for Guile Scheme that will allow it to be used for web programming). Common-Lisp is used by a lot of large-scale systems. http://franz.com (a commercial/proprietary Lisp vendor) has a nice section on the uses of Common-Lisp.

Bite your lip really hard