Buildr: Using ruby to build java.. hmmm...

http://blog.labnotes.org/2007/05/03/buildr-or-when-ruby-is-faster-than-java/

http://buildr.rubyforge.org/

I've just started getting comfortable with using Maven, and
appreciating all the goodies that cam be used from it, then this comes
along... I wonder how much traction they'll get though, considering
the number of people already using Maven. I guess Ant didn't
disappear when Maven came along, so Maven probably won't disappear
with the appearance of Buildr.