The text on this site is set in Llawen, a work in progress. It’s a refinement of Exuberance Primary, the font I released back in 2005, redrawn to accommodate more weights, features and languages.
At the time of writing, Llawen is nowhere near finished. There are wonky curves everywhere, very little punctuation, the spacing is off and there is no kerning. But as I draw, tweak and refine those glyphs in FontLab, and commit those changes to the repository in Github, the site will be updated with the new fonts. And you have a chance to test drive those changes just moments after I make them!
(The above functionality is driven by the fantastic Fontsampler WordPress plugin.)
Incidentally, Llawen is the Welsh word for ‘merry’. The ‘ll’ sound in Welsh is pronounced like this.