Under the hood, Mozilla Labs, Bespin is an ambitious attempt to push the boundaries of what's possible for Web-based applications. Every element of the editor's UI, from the blinking cursor to the editor text itself, is rendered using HTML5u's new element. Its current feature set is limited. Over the long term, however, Mozilla Labs' plans for Bespin are as intriguing as they are ambitious. Once it's mature, Bespin will offer a collaborative, online code authoring environment like no other.