Say hello to Bootstrap 2.0:

Bootstrap 2 brings a plethora of changes and new features to the toolkit, many added as a result feedback from the community. In addition, much of our work was guided by our experiences of working on Twitter.com’s latest redesign where we created a flexible and durable design system. We took the same approach to Bootstrap 2 and came away with more features, better documentation, smarter default styling, and more.