I did it....
I have banners in Landscape and Portrait on the store.
What do you want to know?
You can't use any one tutorial. You have to use an amalgam of them all, and figure it out. There is no copy and paste.
Same with IAP.
Two months ago I started a blog on this.. then I stopped. I think, I might complete the blog -- it appears there is a lot of interest in both implementing IAP and iAd.
And I have a new game under review. It should be out by the end of the week... As I am sure, many on this board are eager for the update, -- DON'T WORRY -- I will post the minute it becomes approved.