XHTML ODP attribution
The ODP require you to display an attribution on any page that reuses ODP data. The recommended attribution fails to validate as XHTML, so I created an XHTML compliant alternative which looks visually identical (at least in standards compliant browsers) but uses <div>s with CSS styles. ODP editor in chief rdkeating25 has informally approved my alternative version on the ODP editor forums so I’m ready to go—at least as soon as I finish writing a script to parse data from their pages ;)