They're my favourite band too; I have all their CD's and have seen them live a few times. I smuggled in a DSLR and took these pics just a few months ago when they came to Melbourne
I do like listening to them while working too. Recently during work days, I've been using a pandora station that was seeded with Tool and Explosions in the Sky.
Interesting hypothesis... I've noticed in general a decent correlation between programmers in general and the metal genre (I'd probably call Tool 'prog metal' rather than 'rock', though I do often see them referred to as alt-rock or prog-rock).