Today my partner and I launched AdShare Mobile. The service allows Android developers to share ads between each other in order to promote each others applications. For every click you get another app, you will get a click back to yours.
We are looking for a few daring developers to give it a whirl and send us any feedback. If you are interested, register on the site http://www.apptoolkit.com. Once registered you can start adding your apps by going to the AdShare page and clicking Add New App. Once you add your app, download the SDK to implement AdShare in your app.
Please let us know your thoughts. Thanks.