They're pretty standard looking - but I still feel they look good.. what do you think? The Free iPhone Blog
Yes, they're absolutely fine. Too many people overload the page with ads, but having only a few well placed ones can be just as effective. You've balanced it right.
Yes they look good. Can you try moving the first ad unit to appear below the title and date of the first post? I think it will get you a much better CTR.