Derick Rethans has officially announced the release of XDebug 2 today on his blog:
After almost four years of work, Xdebug 2 is finally ready. With improved functionality and many new features it is ready to totally change the way you develop in PHP. Some of the new features and updates include improved stack traces, execution traces to files, code coverage analysis and much improved remote debugging support. Xdebug's documentation has also been rewritten for more clarity.
Derick also wants to find out who is user base is and has asked fellow developers and users to send him a postcard and let him know.
As always, you can get this latest version of the XDebug software from the project's website - XDebug.org.