My only criticism of WordPress thus far (and I plan on converting my blog from MT to WP as soon as 1.2 comes out), is that the UI (and this web site) is very Serif font oriented. Usability, education experts, and instructional designers all concur (in research and in practice) that sans-serif fonts are preferrable on the web because of the limitations of monitors. It is easier to quickly read and understand materials displayed in Verdana or Arial than a Times or Georgia font. Serif fonts are fine in graphics where they are more accurately displayed but in electronically displayed running text most people find them harder to read. This is the only major limitation I have seen with WP thus far. Is there any plan on switching over to a sans font or having a font switcher in the UI to allow it to be converted to a sans font for people who have difficulties reading serif fonts on the Web? This, as far as I can tell is the only real usability issue that I have noticed thus far.