The site points to a development roadmap on the Mozilla Org site which indicates the direction the browser platform is taking.
Phoenix will be a redesigned Mozilla browser using the XUL user interface language, said Betanews, rather than the clunkier XPFE toolkit.
And the org will also drop its integrated email client and replace it with a product called "Minotaur", which will work alongside Phoenix.
You can read the whole story with links to the relevant roadmap by inclining your browser in this horizontal direction.
* A READER POINTS out that Phoenix is already available, uses XUL and is designed to be cross platform compatible. The current release, which you can already get, is 0.5, and 0.6 is overdue. It apparently gives all the autocompletion features that Internet Explorer does, but suppresses popups, which Internet Explorer doesn't. And it uses little memory and starts very quickly. It uses built in widgets in the particular OS it relates to. And you can download it here.
Mozilla provides nightly binaries.