I really like coupling html and webgl, but thus far I've only done it the other way round: adding html on top of webgl. I did this in my last LudumDare game jam [1]. I used html to render nice looking text on top of webgl. Although it's possible to render text within webgl it's messy, especially if you want bold or italic text, different fonts, colors etc.<p>[1] <a href="http://min.psywerx.net/" rel="nofollow">http://min.psywerx.net/</a>