From Dotvoid.com, there's a new posting talking about the continued use of PHP4 by developers and hosting companies and how it's effecting the community as a whole.

It is true that the PHP 5 uptake has been slow. Many internet service providers as well as many developers are reluctant to switch. This is probably, as others have stated, a circular dependency.

As ISP:s are reluctant to upgrade the popular open source projects are hesitant to upgrade. I still think the wrong people are worried. Still PHP 5 is increasing it's share and finally the day will come when version 4 will be considered legacy. Hopefully before PHP 6 is here but not necessarily.

He continues on, talking about what PHP5 is really about (it's not just the objects!) and things that can help make it an easier sell to those still lagging in a PHP4 world - like the Zend Framework.