I've just bought an ASUS Eee PC 701. Basically, it's a very small note book computer (225mm x 160mm x 25mm), about 1/3 the size and weight of a conventional laptop. It can be carried around like a book, and comes with a wallet to facilitate this.
It should be very useful in my traveling work, as it boots up in about 15 seconds, and will do most of what my current laptop will do. You wouldn't want to try gaming on it – but that's not an issue for me. It comes within inbuilt wi-fi and a camera, and runs Linux software.
Because I have a WD external hard drve, its basic memory is not a problem.
So far, it's proved entirely compatible with all my external hardware with the notable exception of my scanner/printer, which loads and thinks it's working, but fails to respond. I'm inclined to believe I've overlooked something simple, and will sort it eventually.
In the meantime, it's a cheap ($499) and portable solution to managing information on the move.