I love surplus stores. They're basically the tech version of a yard sale, with tons of stuff that would be nearly impossible to find or afford new. These are three of my favorites. Between them, you should be able to find just about anything you need, no matter how crazy the project.
After a breathless race through the '80s and '90s, desktop computer clock speeds have spent the last decade languishing around the 3 gigahertz mark. That stagnation in processing speeds has prompted scientists to debate whether it's time to move beyond semiconductors -- and what better place to debate than in the journal Science?