WP3.2 – WP_Meta_Query and relation support- Where is the Codex Support

WP3.2 introduces WP_Meta_Query but when you go to the Codex page
WP_Meta_Query the page is completely empty???

Credit to those you have created this class reference – but why introduce it and not up date the codex with information????

Can any one do a write up or add to the codex page that one is in progress and approximate date of release – or a link to the core code