PHP and Java united ... the other way around

There have been several tries to combine PHP and Java by coupling them via network, communicating processes and bridges. Now there's another way: some people have completely rewritten the PHP 5 core and many extensions (PDF, PDO, MySQL, and JSON) generating an implementation of PHP 5 in a .war file called quercus. It can be deployed in a servlet container and seems to run every PHP5 application which uses the supported extensions.
The blokes at quercus also state that quercus outperforms a mod_php application by the factor 4 running standard applications like MediaWiki. It also seems to scale nicely and supports 16-bit unicode. Stay tuned for some real life test results ...