I hate to double-post on one day, but I just had to share this video. I've been following Jetty (the OSS Java application server) and Terracotta (Java clustering) for quite a while. You absolutely must watch this video if you want a glimpse of the future: . Finally the promise of server-side Java is being realized - super-scalability (note the use of Maven too)!
Not only are they smart, but the Jetty and Terracotta people are some of the nicest folks I've ever met in our often soul-less and cut-throat business.