Quite long but full of good information. If you still believe markets are efficient then please read this. If not then just browse it for some cool graphs.
This first one links to the second one. They both cover roughly the same subject but slightly different and they are short. Basically is you use an Exception to handle a predictable case (like divide by zero) you should consider a different career.
I never heard of Content Delivery Network before this post. The concept isn't new, but the fact that Amazon cloud supports this so cheaply is shocking. I guess there is more out there than I have time to learn.
Another DB I have never heard of as well as a list of non-relational DBs with details on MongoDB.
Lean Primer [PDF]
A good, long paper on Lean that covers the subject well.