The MathJax 1.0 release is now available. Get it from our SourceForge project download area.
To install MathJax, please see the installation documentation.
Warning: Don’t use outdated fonts. If you are upgrading from an earlier version of MathJax, please be sure to use the fonts archive included in the 1.0 release. The fonts have been changed and using mismatching copies of the code and fonts can cause incorrect display for the viewers of your website.
Source code is also available via svn. See the documentation for more information.