[nly]

MathML isn't supported at all by IE, Chrome or Opera (even pre-Chromium port?) and Google have said they don't intend on supporting it natively. This means you're looking at e.g. MathJax to plug the hole with Javascript.

Using huge JavaScript frameworks to create complex apps is one thing, but its rather sad when you have to use them just to create documents.

Link [2] also shows that more sites are using BMP than SVG. So while I may be wrong on adoption waining, I'm not exactly pleased with the way rich formats are progressing on the web... it's fairly easy to go from 0.25% coverage to 0.1% coverage.