I was using Visual Studio 2013 Preview but I couldn\'t find MySQL database in the \"choose data source\" dialog window, I even installed the latest version of MySQL connecto
I've not tested it yet, and it's for VS2012 (and I guess it's the same for VS2013) but the following link may help:
http://blog.nwoolls.com/2012/07/25/registering-missing-data-providers-with-visual-studio-2012/