I didn't jot it down. :(
I attended a web installfest (http://groups.drupal.org/node/34800) in Dec. and they suggested using 2.0c as it is the last version which supported PHP 5.2. At that time, the fixes for PHP 5.3 weren't released for 6.x however 6.15(??) has them so it's probably okay to go w/ the latest. The latest release is 2.0i (http://www.wampserver.com/en/download.php) while older releases are on SourceForge (http://sourceforge.net/projects/wampserver/files/).
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WAMP 2.0c
I attended a web installfest (http://groups.drupal.org/node/34800) in Dec. and they suggested using 2.0c as it is the last version which supported PHP 5.2. At that time, the fixes for PHP 5.3 weren't released for 6.x however 6.15(??) has them so it's probably okay to go w/ the latest. The latest release is 2.0i (http://www.wampserver.com/en/download.php) while older releases are on SourceForge (http://sourceforge.net/projects/wampserver/files/).