I use a macbook pro for most things that I need to do when I am sat at home. I have a desktop at work that I have to use, and a desktop here for when i work at home. With the new hard disk I picked up I could actually do a large amount of my work on the macbook if it wasn't mandated it was on the desktop.
I carry my n810 around when walking around town or shopping etc, and use it almost exclusively as a large screen for web browsing. I have mostly given up using it as other things, as I find installing software mostly an exersice in frustration! Maybe I should put a full linux on it or something.
I have an Asus eee which I use when going to trade shows, or travelling, although I am considering replacing that with a HP 2133, when i can see one (for the better keyboard).