I’ve been using Graham Williams’ “rattle” package in R.
What a great piece of software!
Not without the occasional bug, but Graham has been exceptionally responsive to fixing these, which is the kind of service that comes only infrequently (most notably otherwise, of course, from the guys at Q www.q-researchsoftware.com)
Here’s the in-line R command to get the latest version …
And if you go to Graham’s website www.togaware.com you can download substantial drafts of his book Data Mining Desktop Survival Guide (ISBN 0-9757109-2-3). The book (also published in full by Springer Verlag) is a data mining goldmine (ha ha).