Another quickie. Evidently if you have PHP installed on your system after installing WAMP, Apache likes to go grab the php.ini file out of your main install of PHP, not the one installed with WAMP. This was causing issues in connecting to MySQL. If you get an error connecting to MySQL on a clean install of WAMP, try adding the following line to the end of the httpd.conf file that comes with WAMP:

PHPIniDir "C:/wamp/bin/php/php5.3.0"

(of course, replacing the path to the actual installation of PHP inside of WAMP)