My themes are free to download, so this opens up loads of opportunities for people to contribute back to the project at Theme Hybrid.

Since anyone can download the themes and tinker with the code, they're free to send me updated code or changes they've made to make the themes better. In fact, this has happened on several occasions.

I keep a forum (the Ideas forum) open for anyone to post ideas about what they'd like to see with themes in the future. This is a great way for non-coders to get involved in the process.

And, people can modify the themes and release them back to the public. This gives me a chance to review the modifications and implement them into my themes if I want.

Edit

Translations are huge too. The Hybrid theme has been translated into 20 languages and these need to be kept up with theme updates. It's a great way to help your neighbor, especially if that neighbor doesn't write in English.