This week was a huge week week for mobile web development. Here are some quick summaries of the latest tools/announcements.
Live preview your sites in your desktop and mobile.
Google Page Speed for Mobile (requires ICS)
If you're lucky enough to have Android for mobile you can now find out bottlenecks in your sites. It's hard to debug for mobile, so any help like this is welcome.
Sencha Touch 2.0
The best mobile-web framework just got way faster in Android and added a bunch of new features.