WordPress.org compatibility
 

I believe Mysidia isn't compatible with WP at the moment, though with the large amount of WP users, I'd say that it'd be ideal. ^^

Maybe this will help?
http://www.badlydrawntoy.com/2009/10...the-right-way/

This might sound really stupid since I've only used wordpress.com once three years ago, so I apologize! But isn't wordpress.org a framework to help build your blog? And I believe it doesn't support Smarty which is the current mysidia template system?

I am sure there is a way to get the script to work with anything, although some may require editing the core code. How about trying it on your site and tell me what error messages you get?