READ
The Economist published a survey on Microfinance in November, 2005. The series of articles therein are instructional, thought-provoking, and, current. This survey represents an excellent first exposure to Microfinance.
http://www.accion.org/PDF/Econ_Survey.pdf
LEARN
The United Nations Capital Development Fund (UNCDF) offers a free online version of their Microfinance Distance Learning Program. The program serves as an solid introduction to Microfinance.
http://www.uncdf.org/mfdl
The Rural Finance Learning Centre has a number of online lessons. The subject matter is skewed towards rural Microfinance, but the material is straightforward and educational.
http://www.ruralfinance.org/id/5568
SURF
Steven Reinemund
has put together a nice collection of links at the
microfinance.com
portal he manages. Be
forewarned though, easy to get lost in the plethora of
"stuff" out there.