Microsoft PivotViewer
It's not often that I'm impressed by something from Microsoft. I use Microsoft tools and software all the time but I'm usually not too excited about it. However... The Silverlight PivotViewer is awesome. But don't take my word for it - take a look yourself. Basically this control allows you to visualize and sort thousands of items at once. I won't go into detail...if you want to read more you can read Scott Guthrie's blog post about it.
http://weblogs.asp.net/scottgu/archive/2010/06/29/silverlight-pivotviewer-now-available.aspx
The sample app they built works against Netflix’s database of instant watch movies. It works well and it’s pretty neat – something I might actually use! Take a look: http://netflixpivot.cloudapp.net/
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