Put a file into your DropBox folder, and within seconds, it is synced across your PCs, and available if you go offline.  
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  DropBox, a Silicon Valley company that is trying to make online file storage and sharing more simple, has come of out of secret testing and is sending out invites for people to use it.
 What makes Dropbox different?      Super fast
 We're obsessed with performance every step of the way.
 
    Effortless sync
 Changes to your files are instantly synced across your computers.
 
    Works like you do
 No complicated interface to learn.
 It's seamlessly integrated into your desktop.
 
    Always accessible
 All of your stuff is available via the web, so you can get it no matter where you are.
 
    Share the love
 Invite friends and family to a shared folder for easy collaboration around files.
 
    Don't worry about it
 Make a mistake?
 You can undelete files or restore old versions in a snap.
 
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Dropbox - Home - Secure backup, sync and sharing made easy.DropBoks - Free online file storage. (Secure online storage for files.)DropboxDropBox makes online file storage and sharing more simple » VentureBeatMoMB: DropboxDropbox: The Online Storage Solution We’ve Been Waiting For?DropBox : Review, Invites, and 7 Questions with the Founder | MakeUseOf.com