The library is divided into sections based on the area of Swing it helps with. Developers are encouraged to take peeks into each individual section and check out how they can help in the process of building Swing apps in Python. You should also check out the examples directory (not included in the downloadable packages) for practical demonstrations.
The preferred method of reporting bugs and feature requests is through the Bitbucket repository. You need to register to report new issues in the bug tracker.
If you need live help, you can try asking agronholm on #jython on Freenode IRC.
Alternatively, you can send mail to <swingutils at nextday dot fi>.