Where to leave 4E feedback to wotc?

[Starfox]

If I want to leave feedback on the playtest versions of things as published in Dragon, where do I do that?

 

[Jack99]

dndinsider (at) wizards (dot) com

First page of the playtest document.

edit: It's supposed to say "Barbarian Playtest Feedback" in the header

 

[Starfox]

Thanks. That's what i thought, but I wanted to make sure.