One of the most important (and unique!) features of Windows Phone 7.5 is live tiles. Live tiles make Windows Phone truly recognizable, even if you see it from 10 meters away in a store. I created this cheat sheet to help you quickly add live tile features to your app. Enjoy!
I also recommend checking out another quick card for Windows Phone controls and toolkits:
Windows Phone 7.5 Cheat Sheet – Controls and Toolkits

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I created an article with the code to create a live tile with a count > 99.
It draw on a WriteableBitmap using a codeplex sourced helper and a little bit of logic.
Your cheat sheet is awesome and I thought this might help people trying to achieve something similar to me
http://www.wannabedeveloper.com/creating-a-custom-windows-phone-live-tile/