Free *regular* application on iPhone - how to display ads?

Question

What ad networks are available to iPhone developers who want to distribute free regular apps (not web applets) that are ad supported?

Prompted by this story on crappy ap

Answer 1

The Deck prides itself on being a very "high quality" advertising network. I've seen them on a few iPhone apps, but they're apparently picky about who they will allow to run their ads.