MathType 6 has many improvements over the previous version including support for TeX/LaTeX and interoperability with Wikipedia.
Selected Test Results (selected in 'Test Results' table below)
Created some basic formulae, exported in wmf and gif.
What does not
It does not integrate with MS Word 2007
What was not tested
When activating the MathType macro, MS Word shows the following splash screen "Word experienced a serious problem with C:\Program Files\Microsoft Office\Office14\Startup\mathtype commands 6 for word 2007.dotm" add-in [...]". and it forces to disable the plug-in.