A new software from my favourite commercial company, Thoughtworks. They founded a subbranch, "Studios" for such kind of products. I've seen so many tools promising being agile but finally only being flat-featured and non-adjustable. To be released June 2007.
Very interesting article, seems to be an extract of the author's book on rapid sw development from 1996 (sic). Many points (especially #4 e.g.) look quite familiar to me.