We've found just the code you'll need to have the slick looking Windows Phone loading animation on your application. 
The code is over at bugail.com. Here's a look at the specifics of the example.
There are two types of process indicator:
- Determinate – fixed amount of time/data
- Indeterminate – unknown amount of time/data
In this example I’m going to quickly show you how to add a progess overlay to a screen when loading data from a webservice (twitter search service).
Source: http://bugail.com/index.php/2011/10/wp7-tips-adding-a-progress-overlay-to-a-page/
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