Some more thoughts on Groovy from Bill de hOra. He links to an interesting discussion that questions the need for yet another language. To me, the most interesting things about Groovy are

• It supports all (or most) of the features one expects from a dynamic language
• It relies on the most powerful set of libraries that exists (the J2{S|E} platform)
• It has a pretty clean and familiar syntax (at least of Java developers)