Twitter Cards are meant to enhance a user's -- er, advertiser's -- tweets with relevant links and photo previews. Three such cards currently exist, but today the social network introduced a new one: the Lead Generation Card (marketing speak, much?), which essentially lets users accept discounts and provide the required personal information directly from a business' tweet. The feature is located within a brand's expanded tweet: you simply click a button, and your email address and handle are passed along. Essentially, it's autofill for Twitter, which you'll either love or hate. For its part, the site says this feature simplifies the user experience, and it promises your personal info is sent directly and securely to the company you've specified. Currently, a few brands are beta-testing the card, and Twitter says a global launch is soon to follow.