The Zend Marketing team is looking for more feedback about the use of the Zend Framework out in the PHP community (according to the Zend Developer Zone):

Thanks to all the hard work the community has put in we are just about ready to release Zend Framework 1.0 As part of this release we will be doing significant updates to the website and other outreach. This should help make people aware of the power of Zend Framework and all the efforts going on in the community.

As a part of this, they're looking for any and all projects out there using the framework in their sites or applications to let them know via a survey they've created.