Upgrade to latest version (ANSWER RECEIVED)
PermalinkWe are looking for someone to upgrade our site to the latest version and to make minor clean ups, if needed. The site is currently at 5.5.1.
Send me a PM if you interested. We are a non-profit organization and have been maintaining the site ourselves, including any upgrades; however, if someone is able to do this for us without overcharging we would love to have you!

http://www.concrete5.org/community/forums/customizing_c5/rebuilding...
http://www.concrete5.org/community/forums/5-7-discussion/so-hows-ev...
Here's the docs pages for building in 5.7 but there are still plenty of bugs in it so I would hold off for a while. None of your add-ons that are used in pre-5.7 sites will work in 5.7 so you also have to wait for developers to upgrade those blocks.
http://www.concrete5.org/documentation/developers/5.7/...
Perhaps just upgrading to the latest 'old' version would be fine for now. 5.6.3.2 is quite stable and your add-ons will still work.