While Extended Events were present in SQL Server 2008 and SQL Server 2008 R2, they were not widely adopted as a DBA tool.
This was partially due to the fact that prior to SQL Server 2012, there was no UI provided in Management Studio to help ease the learning curve. (Note: for earlier versions there is a SSMS Addin on CodePlex which provides a UI).
However with SQL Server 2012 we now have a Session Wizard.
I plan to release one topic per week (some topics such as architecture will require multiple weeks to cover)
If you have specific troubleshooting scenarios that you would like to see addressed, please leave a comment and I will try to include them.
All Transact-SQL scripts will be available for download at the end of the series.
I wrote the SSMS Addin that you referenced above, and I have a great starter series to point people from last year under the XEvent a Day Series category on my blog: