Uses shitty hand-me-down hardware yet still productive.
Macbooks, $400 headphones... Bah!
It's the same for top musicians, incidentally. If you're selling musical instruments, you're selling to people who follow music and are influenced by which instruments their favorite musicians use. So it's cost-effective to give famous musicians whatever they want in exchange for a plug or two.
[1] Bad example as of late since Tiger Woods has become unpopular and is struggling with his form.
The MacBook Pro touchpad is the only one I've ever used that doesn't leave me wanting to plug in an external mouse.
Currently I'm running a Ubuntu 10.04 64-bit on my desktop with two monitors (24" and 19"), and 10.04 64-bit on my laptop (mid-2008 model MBP with 8GB RAM). For a server I typically use my desktop for prototyping things for myself, and use a Linode server (again, running Ubuntu 10.04, but Server edition, rather than Desktop) to host things I want more reliable, consistent access to (blog, etc). Having consistency across my setup is pretty nice for making sure everything interacts well, both on my development machine and production instances.
I also run Ubuntu on my dual monitor lab machine. I'm an undergraduate student, but I do security research for the university part time with one of the professors.
I still run a virtualised Linux environment, though, because there are some things (such as Git integration in Emacs) that I couldn't get working quite right. It works oddly well overall. I also have four monitors, 'cause I'm weird.
[Edit: I originally wrote "modern" graphics cards, which is a term so variable it doesn't have a meaning.]
Argh! I could go on but I'll just go move files around my sanely organized file browser for a little while to calm down.
I didn't see page up/down in there, so: fn+up/down