New from the O'Reilly PHP Development Center is an article about Why PHP 5 Rocks!

PHP 5, which was released earlier this week, is the first major release of PHP in years to focus on new features. While one of the key goals behind PHP 3 was increasing PHP/FI 2.0's performance and efficiency, at the same time it introduced a whole new set of functionality. [...] PHP 4 provided another speed burst, as it introduced the Zend Engine. However, the majority of PHP 4's changes were behind the scenes. Those features allowed more people than ever to use PHP, but it didn't provide them with more tools to build their sites.

Finally, after six years, the community has revisited the legacy baggage that made tackling some problems unnecessarily difficult.

The article continues on, talking about five of the great new advancements that PHP 5 brings to the table, including: more robust OOP, a rewritten MySQL extension, and cleaner error handling (with exceptions). Overall, this is a great read for those die-hard PHP4ers out there looking to see what all the fuss is about...Harry Fuecks also talks about how he loves PHP 5 (and its backwards compatibility).