Pádraic Brady notes in a new post today that his Services_Yadis package has been official proposed to the PEAR group:

This provides a PHP5 implementation of the Yadis Specification 1.0 a requirement of the OpenID Authentication 2.0 Specification. There are way too many specifications out there! The proposal is a reflection of February's "Zend_Service_Yadis" proposal to the Zend Framework. The main differences (beside the PEARification) were fixing the main bugs the ZF sample code had.

He also mentions his next proposal - to create an OpenID Consumer package.