It seems Apple has used the open source SproutCore framework to build MobileMe, and it used the Worldwide Developers Conference to encourage its adoption by other web developers.

The advantage of SproutCore is that it allows the construction of web applications with a native look and feel without the need for plugins such as Flash or Silverlight.

Written in JavaScript, SproutCore is platform independent.

But combine this with the forthcoming version of Safari that promises significantly faster JavaScript execution, the aggressive distribution of Safari for Windows, and Apple's apparent reluctance to allow Flash onto the iPhone and the pieces start falling into place.

Want to learn more about SproutCore? Visit the project's web site.