MathType 6.7 was just released. It includes lots of new features such as Office 2010 support and increased interoperability with other sites and apps. A nice accessibility improvement came about because of our close collaboration with ViewPlus: it is even easier in v6.7 to generate braille math output using ViewPlus's Tiger Software Suite.
Design Science is committed to making math accessible. For more information on accessible math, see our accessibility solution pages.