Great Free Data Sets For your Bi Testing

One of the biggest problems I have had in my BI career is creating real world data sets to either test or play with the BI applications I work with. Thanks to the team at PowerPivot Info, they have put together a blog post that details a number of freely available data sets that you can download and play with.
I used the 'Federal Aviation Administration' data set which includes over 10 years of flights by airport and on time status. Amazing set of data.
The original blog article with all the data sets is linked below.

http://powerpivot-info.com/post/50-list-suggested-datasets-to-test-powerpivot

Happy mining ;)
Steve