1. I am new to the concept of golf code and stack based languages, but I find the concept, and the implementation, quite compelling. Thank you for doing this - it is thought-provoking.

2. I was unable to get programs to run via http://www.rhoscript.com/try.html. For example:

   >>> "hello" print run
   Sending to server.
   Received response in 237ms.

   >>>

I would expect the output to be "hello" but instead get what I assume are 3 newlines.

3. There is a small error in the text of your tutorial, at rhoscript.com/tutorial.html:

    s/split-by-newlines results in a string with four elements/split-by-spaces results in a string with four elements/