For all those among you who wonder how I can post pictures while I am on vacation in Spain, sitting under a palm in front of the pool :-)
Vodafone.es offers prepaid 3G sim cards. They are not cheap but not very expensive either. I can absolutely recommend the card and the rate which is called "Bono session". Radio reception and bandwidth are very good although I am living at the countryside. For more information give me a note or just google!