First, I hope this isn't a duplicate thread, or repeating something everyone knows about. I know iPhones/apps have been brought up before, but I couldn't find mention of this one.
Anyway, if you have an iPhone/iPod Touch, there's an app for the SAS Survival Manual. There's a lite version for free and a full version that includes the full text of the manual for about seven bucks ($6.95 or $6.99 or something).
I'm cheap, so I just grabbed the free one. It has a text section titled "Essentials" (just started reading through it, seems to focus on what gear to take mainly), a quiz section, some pictures (How-to type stuff), some videos, and some checklists.
Kind of cool.