JXtended donating a number of JXtended technologies to the Joomla 1.6 source.  JXtended will put Joomla in better standing with other Content Management Systems. They  feel very strongly that this move, along with access control improvements. They will still be releasing and supporting the commercial 1.5 version,  but will be providing an upgrade path to version1.6.

More detail : http://jxtended.com/news/company/89-jxtended-investing-in-joomla-16.html