So I've wanted something like quicksilver for a while and I found launchy when I was on Windows but I couldn't find anything for gnu/linux. Till today when I found a few. Gnome-Do, Gnome launch box and Katapult.
I stuck with Gnome-Do because its smooth, the plugin support is pretty good and I love the blog of the developer (see quote later). I do kind of wish for the smaller box style of Launchy instead of the boxes of quicksilver but you can't have it all. Oh it would also be great if the background dimmed a little. You know add a little compiz-fusion power to the whole thing.
On a personal note, I have used Mac OS X, FreeBSD, and Linux exclusively for the last seven years. I don’t use Windows because it lowers my quality of life. I haven’t tried Vista. I recently made the switch from OS X to Ubuntu after realizing that all Steve Jobs wants is for you to shut up and buy a new iPod; don’t you dare criticize his taste or the way he treats third-party developers like dirt. Also, I’m fairly confident that propriety software has no future. Yes, I am aware that proprietary software has a multi-trillion dollar past and present, but this implies nothing about the future.