I agree that app store marketing is very tough, and even with a great marketing strategy it can fall flat on its face. Generally the strategy is send out promo

I agree that app store marketing is very tough, and even with a great marketing strategy it can fall flat on its face. Generally the strategy is send out promo codes to blogs which can provide an uptick for a few days. Besides that you should probably try and introduce social features to the app such as facebook/twitter. Another option is the rising number of pay per install services. My own startup adsreloaded.com (/end shameless plug) is involved in this area, as well as other companies such as apperang, or Flurry's appCircle.