CodeIgniter 2.x Release & Information

[eluser]c69821bcb[/eluser]
On CodeIgniter.com website ... There is still showing latest stable release 1.7.2 .... I checked Bitbucket source code of version CI-2 .... I saw the "ChangeLog" file in the user_guide documentation. Which contain:

Version 2.0.0
Release Date: not yet released

So my questions are:

* Will that be ok, if i start using that sourcecode (from Bitbucket site) for my production sites/projects ??

* When ? CI website will release final stable release of CI-2.0 on this website's homepage ? of course after all bugs fixed. But, just a estimate from your knowledge.

Also correct me, if I'm wrong in the followings:

* In CI-2.0 = New features dose not support PHP4.
* In CI-2.1 = Complete Source Code of CI will be update to PHP5 (End of PHP4 with CI)

--Thanks