Ruby on Rails has caused quite a buzz recently in the web sites I follow. As far as I have understood it's a way to get web applications up and running fast, using a set of tools and Ruby as the programming language.
For those of us who wish to stick with Java, there is now Trails, a framework (as you can guess from the name) inspired by Rails. It has the same goal, to make web application development as easy and fast as possible. I haven't tried it out myself but looks pretty promising.
Trails website says it is "a domain driven development framework". "Domain" seems to be a buzzword nowadays, many new things being "domain driven" or "domain specific". But so far so good, it makes sense not having to do same things over and over again.