Learning about Compilers. Any helpful links?

[FLaMEagle]

I'm currently doing some research on Compilers and I'm in the process of reading "Compilers: Principles, Techniques, and Tools" by Aho, Sethi, and Ullman AKA the dragon book.

Anyone know of any good links that basically has the meat of compilers? This book is not bad but I would like to use some other references as well...

Thanks!