Hello Mariela, I was going to share the same link Rob did 
Duke guys updates it regularly (if nor daily).Unfortunately we're not attending this year.
A good way to do follow up is going through PPTS from the latest HERUG's sessions on SAP - SAP Jam and even see videos of 2014 sessions here in Montevideo http://www3.um.edu.uy/herug2014/
For those attending, please tweet as much as possible 
Cheers,
Michael