Work - a bloated moon or planet rising over a lake by Eric Knight Holbrook. I don't see that one up anymore but you can see some nice examples here: http://www.deepdarkdigital.com/artwork/
Home - I honestly am drawing a blank. Probably another EKH peice.
Laptop - the 30th aniversary barfight scene by Todd Lockwood.
Well, I'm still using the map of Sherwood that came in print form in Dragon mag a couple years back, but the version I have I downloaded from WOTC. It is the core area of the campaign I'm running for our group. It's nice to be able to look at it and ponder their fate.
I've got an adaptation of the image at http://dungeondamage.keenspace.com/d/20050109.html - which is one of mine. It's concept art for Soviet powered armour, and I loved the way it came out. Anyway, that's what it's supposed to be, but I replaced it with a series of arrows, outlines, and visual guides highlighting some of my dozens of desktop icons, as that computer's being fixed in the shop right now and I thought the techies could use some pointers. And I spent twice as long on it as I should have, giving it artistic touches like concealed writing on a dark background and fancy little geometric patterns...
I also get all my wallpapers from www.deepdarkdigital.com he has really nice rendered landscapes there, my current one is the attached image... quite beautiful for a rendered image