itex2MML 0.13
Thanks to feedback from users, another release of itex2MML, the commandline filter for turning a dialect of TeX into MathML.
This release brings the following new features:
\mathfrak{}is now implemented as a synonym of\mathfr{}.\lbraceand\rbraceare synonyms of\{and\}respectively.\:and\;are synonyms for\medspaceand\thickspacerespectively (joining\,and\!which are synonyms for\smallspaceand\negspace).$$...$$can now be used as a delimiter for display equations (synonymous with\[...\]).{ A \over B }is synonymous with\frac{ A }{ B }.
Thanks to Urs Schreiber for suggesting 1,2,3 and to W.K. Park for providing a patch to implement 4,5.
As usual, my distribution come bundled with the MovableType plugin, an itex2MML binary for MacOSX and the source code to compile the binary on other platforms.

TeX4ht
On s.p.r there is a little discussion about how to create XHTML+MathML documents. Igor Khavkine mentioned a tool called TeX4ht which apparently is supposed to transform entire LaTeX documents into some sort of hypertext. The documentation says that output of MathML is supported, too.
Do you know this TeX4ht and how it compares with itex2MML?