According to this new post on Chris Shiflett's blog, Zend has recieved another "boost" to their cash flow to the tune of $20 million in a fourth round of funding.

Chris cites both this News.com article and Zend's own press release on the topic:

The new funds will enable us to expand faster in emerging geographical markets, accelerate our product development and extend the services organization to meet the demands of our growing number of enterprise PHP customers.

He looks at it positively, noting that what's good for Zend is, ultimately, good for PHP - and this is very good for the company.