[NTG-context] Converters to XML

All, I understand very little about MathML and XML. Is it possible to take a Context document and convert it into XML and MathML to be displayed in a XML and MathML aware browser? And what browsers are "aware" for this task? Is it possible to take a Context document and convert it into Braille for the seeing impaired? I'd love to hear about these issues. Pointers on the net would be welcome.