Meta information regarding accepted payment types would be very helpful in bringing the Bitcoin network together via web crawlers. So far, our e-commerce sites that accept Bitcoin and altcoins rely on the Bitcoin word specifically in context within the site to announce to the search engines what we're about. However, we need to be able to stand out amongst other e-commerce sites and this seems like a good place to start.
Something like:
<meta name="payment" content="bitcoin,visa,mastercard,discover,american express" />
