Link to YouTube Video - lecture is 19 minutes and gives a brief overview of research efforts.  Looks like there are two main focus areas: the amyloid hypothesis and targeting tau.

Fairly straight forward and low-technical: should make it accessible to many. Perhaps this helps others put some perspective on the research that is out there? It helped me with a 30,000 ft overview.

http://youtu.be/Gad-boTUSwY

This is from a free, online course on Coursera, presented by the Johns Hopkins University School of Nursing.  The class is titled

Care of Elders with Alzheimer's Disease and other Major Neurocognitive Disorders  

https://class.coursera.org/dementiacare-001/class/index

Interesting are the slides from the Amyloid Hypothesis: