This is essentially a stop gap release that fixes a number of bugs, but also adds a major new feature: MeTA Studio Archive format (.mar). The .mar format allows you to package an application that uses the MeTA Studio platform. This version also includes inbuilt support for Jython, though this is not yet integrated into the UI.
Head to http://code.google.com/p/metastudio/ to get the latest binary package. The current version number is 2.0.19022011 and is also the first binary release in 2011.