Helma.org is providing a lot of gates which you can enter to participate. Whether you are a programing pro, or just somebody interessted - there are ways for you to get in contact with the community and help.

project.antville.org
Here you can post your comments and questions. Report bugs or strange behavior, or suggest new features. It's just as easy as using antville.

www.helma.org
The homepage of Helma.org. This website is currently under heavy reconstruction. But you can still find a lot of information. And a very good documentation (Thanks to Tobi). (Even in some cases it is outdated)

Mailing lists
There is a mailing list (with high traffic) for Helma. Here you will find discussions about bugs, and new features of helma itself. This is a very technical list, but it helps you to be up to date.
There is NO mailing list for antville-development yet. This is all located at project.antville.org

Bug Database
Bugzilla helps us to get rid of bugs in Helma. Please read the guidelines, before you report a bug and doublecheck! (maybe with a different browser or operating system).

CVS
Concurrent Versioning System. This is a system that helps a group of people to work on the same code. Basically it keeps track of changes and helps merging different versions of a code-file. Find out more at google or see http://www.helma.org/contrib .
To get an acount at the CVS, which allowes you to contribute, write a request to the mailing list.