I looked for the same thing, but it seems that there is really nothing right now. One thing being Zend still in Beta. However I've been thinking that I might contribute a simple cms + front-end application to help things get started. No promises when... Right now I am in the process of building and designing a new CMS system for the company I work for and it's being based entirely on ZF.
So when I get time I'll try and put together something.