I'm not sure if this is of interest to anyone here, but we've had a few usesthis articles in the past -- and I figure that even if nobody is interested in what I use, people can talk about their own systems instead.
I found it quite interesting that you seem to be a minority in the way you use the desktop. I would have expected you to run a tiling window manager and emacs or vim but it is somewhat refreshing (and interesting) that you use kde with konquerer as your browser and kwrite for code.
As an aside do you use konsole for you console as well?
Regarding the heat issue you are having with your laptop: I was having similar problems with a different laptop, and I got an "XPad Slim" (http://www.xpad4laptop.com/) cooling pad to put under it. It weighs around a pound, has no fans, and does a pretty decent job of dispersing heat from the computer. No more burning legs!
Yes, but I don't want to give up the availability of short bursts of high CPU, so I only do this if I'm expecting to spend a significant time compiling things.