Per the suggestion of Tim Starling I implemented a way for extensions to display their credits on Special:Version ( see it live at http://commons.wikimedia.org/wiki/Special:Version ), to add your credits to the page just include the following in your extension:

$wgExtensionCredits[$type][] = array( 'name' => 'Example extension', 'author' => 'Foo Barstein', 'url' => 'http://wwww.example.com/Example%20Extension/', );

Where $type is one of 'specialpage', 'parserhook', or 'other'.

Happy hacking.