This week's book giveaway is in the Performance forum. We're giving away four copies of The Java Performance Companion and have Charlie Hunt, Monica Beckwith, Poonam Parhar, & Bengt Rutisson on-line! See this thread for details.
You can get the source of JavaMail from Sun, but it's not particularly convenient. You must download the source of Java 2 Enterprise Edition, which includes JavaMail. I don't remember exactly where this is on Sun's site.
Betty Rubble? Well, I would go with Betty... but I'd be thinking of Wilma.