Download the latest version of TaskBoard here.
You can also download the current development version, but keep in mind that it is a work in progress and should not be used in a production environment.
Contributions are welcome from everyone. If you're a developer, submit a pull request for review. If you don't want to do that, then please create an issue on the Issue Tracker so I know what the community wants from TaskBoard.
If you want a really easy way to contribute...
Of course, TaskBoard is an open source project so you can browse the source and even create your own fork.