I just registered LaunchBar. If you are a Mac user and you consider yourself a "power user", this is a must have utility. It can launch applications, web site bookmarks, documents… you activate it by hitting command+space bar, then type the first few letters of whatever you want to access and hit return. Get it, use it, love it.
I just wish I had an equivelant utility on my PC at the office. If you know of one, share the good news.