Twitter hosted an invite-only, closed-to-press developer event this week. According to angel investor Dave McClure, founder of business incubator 500 Startups, Twitter is expanding its Card options for developers to help build features for its site and apps. The Cards will allow developers to display photo galleries, media players and deep-links to apps within an individual tweet. Flickr, Path and Foursquare expressed their support at the event. Continue reading Twitter Cards Enable Developers to Display Media Content