Oh, yeah. I'm not saying they're a complicated concept, but the annotations makes it all really seamless. You basically tell the compiler to call a preprocessor by saying "Hey, I want this method to be a web service. Take care of that for me," and everything else is done behind the scenes for you. There are built-in role-based security mechanisms that can all be used through the annotations as well.
It's all pretty intuitive, but since it's completely new to me and I've never messed around with them before, I figured it'd be good to do some more formal reading on them.
I get free access to safaribooksonline.com, which looks like it has some pretty good books on web services, but I was wondering if you guys had some titles to recommend.