DT-Alpha plans on becoming the next generation of online marketing training. It provides articles on marketing changes as soon as they are written, always staying up to date.
I find that concept quite interesting, but was quite skeptical that it would work. After the install you have a scrolling ticker across the top of your screen that shows article titles from one of the host authors. I am still not sure how well this will work, time will tell :-)
My previous method of study has been to do a topic search when I find I need some information. It will be interesting to see how this new technique will complement my current method.