InfoWorld has a very good article centering around this week's Zend/PHP Conference & Expo. In their article, "PHP event: Open source accommodation stressed" a few good opening lines to use as a teaser for the article:
Rather than fighting the open source wave, commercial IT vendors do what they must: try to ride that wave...
..."It seems to us from where we sit that there's really no choice," said Tim Bray, a Web-oriented generalist at Sun and a co-inventor of XML. "A substantial portion of the market has made it clear with their wallets that they want to deploy and run open source software."
"We can't go back. It's too late," Bray said.