The autoload plugin: loads jsMath.js only when it is actually needed on a page. The smallFonts plugin: makes the super- and subscripts larger for when small fonts are used. You can dynamically load jsMath extensions on demand from within your TEX code. There are additional fonts, such as msam and msbm, and you can make your own. You can use CSS styles to control the display of full equations or individual elements within an equation. You can have "hot spots" within your mathematics.