Although I will be perpetually adding to it, I've now got a working first version of my Beginner's Guide to MathML. Take a look and see what you think. Constructive feedback is always welcome.
More as an exercise than anything else, I've created a javaScript class for converting and comparing colours between the different formats specified by the W3C's CSS Colour Module Level 3. If you can cope with my archaic English spelling you may be interested in my Colour.js class.
Finally, I've dropped the idea of creating 'browser test' pages (there are many available on the internet already) and replaces it with a Demos section. There's already a short demo for GeoLocation, which I will expand upon soon.
If you are a web developer interested in particle physics, you may also like to know about the FeynWeb project (located in the Particle Physics section).
It's a PHP based package which generates SVG Feynman diagrams for easy inclusion on websites. The first beta version will be released soon