Hi

I've written three Tutorials. They are at the Swiki of the Squeak e.V. 
http://swiki.squeakfoundation.org/squeak-ev/52 and in german language.

Events ... this is about the triggering technics in Object.
SUnit ... a very short introduction in Testing
Buttons ... building a Morphic Button (based on Events)

I will translate them to english next.

enjoy
            Chris Burkert
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Student of applied Computer Science at Chemnitz University of Technology
      http://www.chrisburkert.de/            chris at chrisburkert.de
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"I invented the term Object-Oriented, and I can tell you I did not have
  C++ in mind." - Alan Kay --> http://www.whysmalltalk.com/