When Dropbox decided to get all close and cozy with Facebook Groups, that was just the beginning. With its new Chooser tool any developer can integrate Dropbox for quickly and easily sharing files stored in the cloud. Rather than upload or attach files from your desktop you can simply link files from your online folders. And, since the attachment is actually stored with Dropbox, rather than copied to a site's own servers, every time you update a document it's automatically updated for everyone else too. The first site to integrate the new tool is task management service Asana. Check out the source for more info from both companies.