Consumer Reports on Drugs

This has been around for a few years, but if you don’t know it exists, then you would find it valuable.  Consumer Reports launched a website which offers you good, independent information on prescriptions (Consumer Reports Best Buy Drugs).  Medco was smart to partner up with them early on and make the content available to their members.
You get basic disease information, drug information, cost information, and some cost savings ideas (i.e., take generics). 

A good clinical site which is a partnership of Express Scripts and the St. Louis College of Pharmacy is called Drug Digest.  I have used it many times and know the pharmacists that create the collateral.

BCBS of MI also has a great site on generic drugs (or unadvertised brands as they call them) which allows you to calculate cost savings and learn more.