In a new post to his blog, Pádraic Brady gives an update on the status of his proposal for the Zend_Service_Yadis package:

Back in late February, I submitted a proposal to the Zend Framework wiki to see if Zend_Service_Yadis could be added as part of an overall objective to natively support OpenID (and related technologies) within the framework. Yadis is a suitable standalone service since it's not OpenID specific and is therefore useful for a number of other purposes. That proposal has seen a few revisions since the initial draft so I'm hoping that by the time Zend Framework 1.0 is released it's in good enough shape to allow for a comprehensive review and critique.

As far at the current status, he mentions the revisions it's gone through so far and how it's progressing towards "completion" (an Alpha state). He also points out that the component will not support using Internationalised Resource Indicators (IRIs), however "support for XRIs will be supported, but may not initially be concrete".