Promotion of my iPhone apps

I have few of the applications completed and already launched in itune stores.

I need to promote my applications in order to reach my targeted audience and to get some profit out of my investment.

I am unaware about the marketing and promotional activities of iPhone applications and needed to know the proper way of doing it.

Also i would like to know rates and plans how you will carry the tasks and how much time duration is required to get started earning the profit out of it.

Looking for very serious bidders who really have knowledge of this and can help me out of the same.

I am planning to get the work started early next week so try to provide as much detailed information as you can and i will personally contact the one which i feel has good track record and sound knowledge of this.

Please don't ask about the budget as i already informed that i am unaware about the terms so have no idea at all.

Bids are open for individuals as well as companies.