I noticed this recently in Joshua Eichorn's blog ZActiverecord Can't Work and the comment by Mike Naberezny who seems to be involved in the implementation.

The desire for static calls is interesting. I know it has been discussed here that static calls are not that desireable. It makes me wonder how thoughtful the peer review is.

Beside that, there is definitely a sense that they are bumping up against the limitations of PHP. I wonder about ZController which has not been mentioned at all.

Also note the framework-feedback@zend.com email address. Nothing to give feedback on yet, but there's an email address.