Hey,
I am going to be in Santander taking advanced classes for a month starting July 30th. It is with the Universidad Internacional Menendez Pelayo. Check out their website at
www.uimp.es, you will see a link to their summer language program. My restriction was that I needed a program that had an August session, which is hard to find, and my professors tell me this is the best program available in August (otherwise, I hear good things about the NYU programs). I will be happy to tell you what I think of it.
Luis