Over the weekend I was told about Twitter Cards, a set of content attribution meta-tags that augments a Twitter post to a particular page. It works a whole lot like Facebook's Open Graph protocol... even down to having its own Linter to test out what you've done. The weird part is that apparently you have to apply to participate? As in, the tags won't work until you tell Twitter that they're there and someone reviews them? Hopefully this is a holdover from the announcement because it's an awful idea. Aside from that, it looks great and I plan on integrating them here soon.