Dropbox aims to simplifying file backup, sync, and sharing for the world. Like other Y Combinator startups it is small and focused - 3 MIT computer science alums. Watch a web presentation that shows a very useful looking service. It is in private beta now - you can register to be notified when it is open for public launch.

Y Combinator: “We care more about how smart you are than how old you are, and more about the quality of your ideas than whether you have a formal business plan.” You have until April 2nd to apply for funding for the current cycle.

Related: Google and Paul Graham’s Latest Essay - Six Principles for Making New Things by Paul Graham