h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

If you are an IT kind of person, or just do a lot of taking things to pieces, I can recommend the Cybertool. As well as all the usual tools, blades, can openers, corkscrew, spike for extracting girl guides from horses saddles etc. it also has a screwdriver attachment with 6 different mini bits, screwdrivers and hex drivers. Not only that, but the case is a groovy deep translucent red so it matches your iMac (if you've got a red iMac!)
In the UK at least, it's worth shopping round on the net for a SAKn. I got mine for at least £10 less than I could find it in the shops.
Incidentally, why is it that when you show someone your Swiss Army Knife, they immediately open all the blades out at once, so that when you put them all back again, you end up losing two fingers?!