Thanks to Kelly Anne, and my family I got a iPad for Christmas. It was literally my only present but what a present it is. The two things I want to use the iPad is for entertainment (Netflix, etc) and to use to organize my notes at the table.
First off I recommend reading this excellent thread on digital readers over on the SJ Games Forums. PDF releases are a big part of the GURPS Product lines now and with the advent of e-book readers and tablets people are interested in how to effectively use them. Then there is this page on Enworld with a good list of useful RPG utilities for these devices.
I am excited about using the iPad as my experience with computers suggests that touchscreens combined with the right software are the way to go.
I bought Goodreader to handle PDFs on the iPad. It has a tabbed interface for multiple PDFs and a handy customizable bookmark list. It also nice that I can organize everything into folders. So on the second day of owning the iPad, I downloaded my copies of GURP Core campaign book (has all the rules) and my copy of Swords and Wizardry and spent some time bookmarking them.
The bookmarks are chosen on the basis on my experience on what I looked up the most during a session. I will working on the Swords and Wizardry Monster Book and a couple more of my GURPS pdfs. One nice thing about the Core Book on other GURPS PDFs is that they have a nice table of contents already built in.