The Asana-Math OpenType font includes almost all mathematical symbols
included in the latest version of Unicode. In addition, it includes
a MATH OpenType table so as to be useful for the typesetting of
mathematical text. It has beeb tested with XeTeX 0.997 and the
output is comparable to the output produced with Cambria-Math.
The font is not finished yet, but it is released as beta software
in the hope that people will use it, diccover bugs and report
them back to me. Last but certainly least, I used the pxfonts as
a basis for the design of most glyphs.