I've found in my professional life, I've grown interest in all sorts of things I wouldn't have touched with a 10-foot pole in college. Back then, I would have found nothing interesting about payment system, but I now work for a payment processor, specifically in the risk management area, and love the constant learning that goes on.
I'm starting this largely for just myself: a way to track different resources I run across. In a way, it'll be my own reading list. If you happen to run across here, and share my interest, please feel free to share your own points of light.
To start off, an interesting article at InformationWeek which is seems surprisingly complete:
http://www.informationweek.com/shared/printableArticle.jhtml?articleID=197004939
