Digg the articles, best way to get them more exposure (
iPhone App Developers Threaten To Sue Apple Over Late Payments). Apple isn't going to respond to a bunch of developers emailing them complaints, and probably get lawsuits thrown at them every day. But they will respond to bad
PR, so this may be your best way of getting them to take action.
I personally have no beef with Apple, so I'm not here to bash them at all. They've been very good to me so far and I am very happy with the app store. However, I find it troubling that a company that I have stood by for so long is mistreating their #1 asset (the development community).