Here's a new demo I finished last week. It uses NodeJS as a backend which pushes changes instantly to all connected clients. The example uses ST 2.1, and Ext 4 with our Scheduler running on both those platforms. I hooked up a MacBook Pro, iPhone 4, iPad 2 and Nexus 7 to the same Node server and here's the result:
Wanted to find out when this would be released for Touch, need to use a scheduled and was looking at your site, and need to build for ExtJS and ST to support multiple devices.