It is now possible to promote one’s iOS application on the accompanying website using Smart Banners. This new technology informs iOS devices of an application to promote when the correct meta information is found in the header of a web page.
<meta name="apple-itunes-app" content="app-id=467452978"/>
Beyond simple promotion, it’s also possible to pass arguments to one’s application via the View link in the banner. For more information, check out this blog post.