How many ruby-ists have to do statistical analysis or data cleaning
prior to analysis?

Is it not something that is done often by web developers?

What is the well known software out there for statistical software or
data transformation software? That is open source, or at least free of
charge? I mean besides R, I think I understand what R's strengths and
limitations are.

There is a number of applications at
http://directory.fsf.org/math/stats/

but I do not know how mature they are (except for the one I submitted
(vilno)).

Is there currently a successful project for incredibly user-friendly
open source statistical software, usually using a GUI, to compete with
SAS (JMP)  or SPSS? ( R is more for research statistics, with a tough
learning curve.).

Appreciate your feedback,

Robert