While GURPS is still one of my favorite RPG systems, I have to admit that I haven't paid much attention to it in the last few years - my local gaming group is absolutely uninterested in using this system, and my new side business of translating German folk tales has left me with far less time for recreational RPG reading.
But I am curious - what new and exciting stuff has come out for the system in the last few years?
4e Revised is completely compatible with 4e. Som wording has changed to fit more contemporary sensitivities, the layout is changed to two columns for better readability and there's a few rules that originated in supplements added to the end. They even made sure the page references for rules stayed the same apparently.
Your books are still current ;)