As Google takes its privacy-exploding eponymous Desktop Search app out of beta, it seems to have picked up an idea or two from Nicholas Jitkoff's classic world-bending launcher, Quicksilver:

Three months ago, I came up with an idea that makes it easier for users to find what they're looking for: a search box in the middle of the desktop. It's very accessible -- all you have to do is press your Ctrl key twice. After some experimentation, people are telling us they like it and use it.

Tomas Gunnarsson, Google Desktop Software Engineer, Official Google Blog