kgreenwald on "Dreamhost Upgrade to Ubuntu; Now missing MySQL Extension."

I host with Dreamhost and was automatically upgraded to Ubuntu this past weekend. Now when I go to my site, I get the error: PHP installation appears to be missing the MySQL extension.

I contacted Dreamhost support and was rerouted to this page:

http://wiki.dreamhost.com/PHP.ini#Upgrading_your_site_.28if_you.27re_moving_to_Ubuntu_from_Debian_servers.29

Truthfully, this means nothing to me. Is this something I switch within Dreamhost or is it in Wordpress? If WP, then how do I even get into my site when my "www.kristingreenwaldphotography.com/wp-admin" site won't work?

Any guidance is appreciated!