[Petronski]

Not sure what its called technically, but the breakout view where you can see all of your running windows at a time. That thing is a wonderful way to "declutter" your desktop when you want to switch to a new task.

Expose.

I run a knockoff on my XP called TopDesk. It is a simply brilliant design.

[rom]

Thanks for the assist (re: Expose) and also for telling me about TopDesk! Now I'll have to make sure my Windows boxes have it. It is a wonderful idea.