Check out this new article from the Daily Illuminator that Steve Jackson Games posted:
April 7, 2008: GURPS: The Basics
At the core of every edition of GURPS is the Basic Set. True, for Third Edition the need for the Compendiums was pretty strong, but that's why we released the new edition.</p>
In any case, e23 is your one-stop-shop for the cores of GURPS. We've already released the GURPS Characters and GURPS Campaigns for Fourth Edition. GURPS Basic Set for Third Edition was uploaded a couple weeks ago, and just days ago, GURPS Compendium I went up for sale. You'll see GURPS Compendium II fairly soon as well.</p>
GURPS, in a digital format for easy storage, transport, and searching. It's a good time to be a gamer.
-- Paul Chapman