MediaStream was developed by what became known as Team Razorfish. This team was originally put together by Mike Beecham who posted in the xbmc forums, looking for people interested in collaborating on a new skin. The development of the skin took about a year with the skin finally unveiled to the public on 08/08/08 (8th August 2008).
It then lay dormant during most of 2009 but has been picked up again with v1.50 released in January 2010 bringing the skin more into line with recent advances in XBMC. Work is ongoing to add more features and clean up the code and interface to make it as user friendly as possible.