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Re:Why is DropBox Thriving? by dawie on Tuesday September 29, 2009 @04:37PM (#851277)
Dropbox also has a bit of secret sauce. They have some technology that can pick up which bits changed in a file and only sync those (which makes their service way faster than others)
Re:Why is DropBox Thriving? by hyperbovine on Tuesday September 29, 2009 @08:43PM (#851655)
librsync (http://sourceforge.net/projects/librsync/) does this. It's LGPL'd so I wouldn't be surprised if they were using it. Certainly a lot simpler than reinventing the wheel.