i heard from a good friend that works at php.net and on the php core that php 5.4 alpha is released and your are able to download and compile the new version to get a heads up on what new with php.
also heard a hint that type hinting will be depreciated in coming versions of php and pushed forward will be namespaces.
this might be news to alot the php news letter and pecl IRC confirm this as well and my buddy is the co - release master at php.net for the new version and has been doing a great job with the core and pushing php further.