Is it possible to set a cookie in an iPhone Application that persists, so that later when the user is in Mobile Safari, that cookie can be sent to a webserver?
I'm new at iPhone development, but wouldn't opening a UIWebView allow your server to set a cookie on the browser so then when the user visits the site with Safari the cookie would be readable to your web server? Perhaps a hidden or small UIWebView? I can't tell what the use case is from your question.