Apple's iAd Network opens it's doors to the public

Apple's new iAd network is now available and open for you to start producing ads for iPhone 4 apps.  The question becomes, just how easy is it for an ad content developer to produce iAds?  How hard is it to integrate iAds into your existing apps? (Upgrade to iOS4 required.)

The iAd Network offers you a new, easy-to-implement source of revenue through incorporating iAd rich media ads into your applications.

Apple sells and serves the ads and it's a 60/40 split, with Apple taking 40 percent.  What is not mentioned until you read a little farther down is that if the user exits out of the ad early, the advertising revenue is adjusted substantially lower.  How much lower I do not know as of yet, but I'm itching to find out.

Will you be designing or implementing iAds in your current app (when updated for iOS 4)?  Do you currently us a ad network in your app such as AdMob or Greystripe?  Now that there is controversy about the data that ad networks are allowed to share with third parties, will you switch over to iAd, stay loyal to your provider or diversify and user multiple ad networks to market your app?