With the recent unveiling of Facebook comments, many have questioned the future of Disqus, the previous comment widget darling. There are some advantages to each, but something Disqus definitely has going for it is its
Disqus API, as well as other features like email moderation.
Remember when Mark Zuckerberg blamed the problematic old Facebook mobile app--dubbed "freakishly slow" by some--on "betting too much on HTML 5?" So does backend-as-a-service (BAAS) provider Sencha, and to rebut Zuckerberg's assertion that using HTML5 was "one of [Facebook's] biggest mistakes," Sencha built its own mobile webapp, Fastbook, to demonstrate that HTML5 is ready for prime time.