Source : smarty
[17-Oct-2008] The Smarty 3.0 engine is well on its way, morphing every day. The alpha branch SVN is available to browse here, and the README for it is here. Feel free to contribute your thoughts in the forum. This is alpha code, meaning it is not complete. Don’t try to use this for production! Once the feature set is complete, it will move to beta.
You can checkout Smarty 3 Alpha with SVN:
svn checkout http://smarty-php.googlecode.com/svn/branches/Smarty3Alpha/
See also the dev mailing list: