I'm guessing I'm in the minority here, so you might not be able to do anything, but I can't read your website on my iPhone 4S safari because I can't close the popup that opens! I can't use chrome, it just dies after a while on every site.
the "x" at the top and the "close popup" link at the bottom, are visible *iff* I'm scrolling the screen. as soon as I let go, the popup automatically scrolls back, hiding them.
Is there anything you can do?