I've used Pylons for personal stuff for awhile. I like it's modularity, MVC architecture, and debugging. But I have to use Java at work so I'm always on the lookout for simple Java web frameworks. Recently I discovered the Play! framework and after playing with it for a few days I really like it.
Skipping the compile step is great for development and the whole framework encourages stateless HTTP which I prefer to managing sessions. The documentation is pretty good for a project this young and I'm really excited to see where they go from here.
