I know this is a strange request in a Drupal group, but I'm not sure where to look for a Joomla expert in this area, and BDUG is a group I trust. I have a friend who runs a local non-profit who needs help with their Joomla site. Their site has apparently been hacked, and I have no idea how to help. I believe that some of the configuration or template files have been compromised on the server. I think they've been convinced to migrate the site to Drupal in the near future, but in the meantime, they could use some help fixing the immediate problem. They do have some funds to pay for assistance, but it is a non-profit, so I'm hoping to put them in touch with someone who is familiar with Joomla and can help them out for a low cost or out of the goodness of your heart. The site is http://www.friendsofruwenzori.org/ if you are interested in seeing what their cause is. They do great work.
If you are interested, please contact me at email@example.com.