Definitely not. Type hints now throw E_RECOVERABLE_ERROR, and that should be the same for any other typehinting system that we add.
Then we don't add any, because without static type control it's just a ticking timebomb waiting to blow up your production code (and having application display "An internal error happened, please contact developers" is blowing up no less than having blank screen).
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Stanislav Malyshev, Zend Software Architect
stas@zend.com http://www.zend.com/
(408)253-8829 MSN: stas@zend.com