Nick Lewis: Drupal is Part of the PHP Problem
Until this post by Nick Lewis, I've been in the camp with the folks that say PHP-based content management systems such as Drupal should be compatible with both PHP 4 and PHP 5. After reading his post, I'm convinced he's correct that new development should be geared toward PHP 5. It's hard to fight for the future when you continue to hold on to the past...
Should Drupal move to PHP 5?
In one word: absolutely.
In one sentence: if we don't, the drupal project will die along with PHP.
Something old is new again. The Blue_mark theme for Drupal 4.7 is available at CMS Report. The Blue_mark theme uses Drupal 4.7's default theming engine, PHPTemplate. This theme is released under the GPL.