For more information and working demos visit: http://galleria.aino.se/
Please don't post any support related issues on Github.
If you need help we have a small beta support community over at: http://getsatisfaction.com/galleria.
A good way to get started is to read the 'Geting started' section and check out the demos in the repository. Make sure you view the source as well as there are some useful comments for each theme.