I agree with @codinghorror but also understand the impulse. It would be nice to be able to provide users with fields they can complete so they can find their way to each other, for example to list tags of areas of expertise, languages spoken, what they are looking for etc. Maybe the custom fields could optionally be searchable?
But then again discourse is a forum and not a social network, and if it does its job people will find their way to each other through their discussions.