A nice visualization of what WALS is about (judging by chapter titles):

Created with Wordle.

We’re always curious to learn about how the WALS data is used by others.

Recently, a very interesting site came to our attention: The Conlang Atlas of Language Structures uses the WALS feature set as questionnaire, letting people fill in the values for various constructed languages.

This may be a model for one way to allow people to extend WALS by adding new languages.