Yes, I personally do. I like to keep track of how the Java community responds to some of the curve balls that the Sun/JCP throws us. I find that most OS projects arise as APIs are imposed upon us and we play with faster, easier and better ways to do things. Like
Struts for example. which came about to fill the void for MVCish frameworks in Java and then triggered the direction of projects like Tapestry that appear to deal with the complexity of Struts and on and on. I like this evolutionary cycle in Java, which I don't think you see much on the MS side. They seem to take the Blue pill without hesitation. We Java guys seem to let it swirl in our mouth for a few moments (sometime years!) before we spit it out and chew on that delicious red pill!
Brian