I agree. CF has been a rather slow and hard to come by language on the net. I've seen few servers that support it, and find that an increased cost is associated with it. Flex is a pain to connect with PHP compared to CF, so we may see a resurgence of CF.
I'm curious how silverlight will effect this though. There is a 95% probability that I would choose C# as my backend over CF.
As of PHP 5.5, the MySQL library has been officially deprecated. It is recommended to move to either MySQLi or PDO libraries for your mysql connectivity. See here for help choosing which interface you prefer: http://php.net/manual/en/mysqlinfo.api.choosing.php