iPhone Site List

HEllo,

I currently offer an iPhone ebook and have been able to build up a list of around 50 opt ins so far. I'm wondering now how do I take full advantage of this list?

I have setup a series of around 12 emails that go out every 5 or 6 days that have some advertising banners in them, but is this the best way to go about this?

Just looking for some advice.

Thanks.

I'm not sure banner advertising would be the best way to monetize the letters. Instead it might be better to do accessory product reviews or something. Or even set up a good blog or site like crackberry.com that people always come back to.