One thing to keep in mind though, is that they don't come with a CD/DVD drive, but as far as I'm aware, there is the capacity to hook an external drive up to it (This is for the Asus ones; I'm not sure whether any of the other brands have DVD drives or not).
I would buy one for myself in a flash if I could justify having my normal laptop as well
They are awesome...
I still have my normal PC for all te grunt stuff but the lappy goes everywhere with me.