If you are like me, and love to soak up as much technology as you can, you'll love this site:
It has currently got 32,885 white papers listed for your review/download at no cost.
It is broken down by section, very logically. Here are the main topics:
Professions and Industries
These are obviously broken down further. A white paper is a great launching point to get an understanding of some new technology that you might want to introduce into your environment. Plus, whitepapers are often times written by actual administrators in the field. These are usually people that you can trust, at least more so than marketing folks in any case...