As the Windows Phone 7 have either a dark (black) or light (white) theme which can be applied it will become very important for you to know which theme the user enabled in order to determine your applications color schema, this is assuming you are using styles which are not built into the skinning on...
While working on an application targeted towards WP7 I wanted to have the application change style resource which was attached to a border element based on a value (aka a status) in my view model. After searching around for a bit I was not able to come up w/ a complete end to end solution, only bits...
Today MS announced an updated release of the WP7 tools. I can tell you from using intermediate builds this is getting better and better. Check out the build here - http://www.microsoft.com/downloads/details.aspx?FamilyID=c8496c2a-54d9-4b11-9491-a1bfaf32f2e3&displaylang=en Have fun with the new Bits...
If you are trying to create a WP7 (or any silverlight project for that matter) and you are trying to access a WCF web service you may receive the following error when you try to create an instance of the WCF service. Cannot find 'ServiceReferences.ClientConfig' in the .xap application package...
Because I have just spent the past 20-30 minutes trying to figure out why my Application Bar button was not being disabled when I set the IsEnabled = false on an ApplicationBarIconButton only to find out that this is a bug in the CTP I thought I would share this just in case someone else was having this...