An other interesting free book published by Microsoft: What's New in Exchange Server 2003.
This online book provides important information about using Microsoft® Exchange Server 2003. The purpose of this book is to outline the new features in Exchange Server 2003 and provide the basic information necessary to begin using these new features. This is not a comprehensive document about Exchange, but a guide for getting started with testing and running Exchange 2003.
Download it! 
I've just read the notice that Google might be backing down on some of its planned ideas for Gmail... Google had an accusation that by scanning the email it was infringing users’ privacy.
I hope that Google could continue the good works it's doing on Gmail system. I think that the question about privacy is not so cool as something want to push...
You want a free 1Gb Mail account with Google? Ok, you can have it, but you have to submit by our condition.
Our condition are not good for you? Ok, you are totally free to choose other solutions.
I'm thinking about a little conspiracy around Google and this new mail service... 