I've had very mixed results with ad-supported apps. For me, they've been successful outside of App Store (and a big old "thank you" to every single one of you who has clicked through! I very much appreciate it!) but not so successful in App Store itself. Now, with Apple behind iAds, I'm willing to give App Store another try.
I think I'm going to stick my toe into the ad waters gradually. I think I might add advertising to one or two of my apps and see how they perform over a month. What about you? What strategies are you going to take? Let me know in the comments -- and please do identify yourself there as a primarily paid developer, a primarily free app develop, or as a user. And with that, I'm going to turn the tables over to you as developers and users. I've included a bunch of polls here, and am looking forward to reading your thoughts in the comments as well.