is a new project on the Internet inspired by Dropbox (a clever fileshareing/collaboration and file syncronising util that uses cloud based storage), SparkleShares force is that it supposodly will be free/open source and you can thus setup your own servers, sounds like something to make a mantal note of..

The first version will be in Linux but should be followed by a windows version, presently no version is publicly available though (as it’s very early in the program, announced June 10th 2010).