Just a quick note about a piece somewhat "outside the community" that covers PHP and how popular it has become. Information Week has a new piece based on the results from Netcraft in a search for PHP.

PHP, a little-known open-source scripting language, is becoming dominant on Web sites, according to Netcraft.com, the U.K. surveyor of the Web. [...] Netcraft says PHP is found on 52% of the 14.5 million Apache-based Web sites that it inspected, compared with 19.4% using Perl, another open-source language. Once again, it's wonderful to see that PHP is out there and making a difference in web coder's lives - and making them easier.
There is one curious thing I'm not too sure about - see what you think of this:

The Netcraft survey didn't include Web sites using Microsoft's Internet Information Server because IIS doesn't respond to an automated Web crawler's inquiry on scripting languages. If Netcraft had, the survey would have shown that PHP has grown to be roughly equal to Microsoft's Active Server Pages (ASP), Caraveo estimates.