As has been discussed numerous times, the best way to “pay” for WordPress is to give back to the community by volunteering. One can help add to the documentation by helping with the Codex, answering questions in the forums, or if you are a coder, helping with bug fixes. Now another area is in need of help. In this post shadow, who has maintained the theme viewer as a neutral site to view the multitude of themes available, is seeking volunteers to help tag, list, and add more themes. So if you are a fan of the themes, and would like to chip in, visit the thread in the forums, see what needs done, and drop him an email (address available in thread)