On the left sidebar you can see the documentation index.

Firstly, you should begin from the Quick Start Tour in order to grasp an idea of how Curiosity works - and see some screenshots too. The other sections of the manual show in greater detail how Curiosity can be used and configured.

Dont' miss to check out the notes about Microformats.

It is assumed that you are familiar with XML technologies.

As Curiosity is a work in progress, there are a number of issues and unimplemented features: so, don't miss to have a look to the roadmap.