I have been digging into the use of Balloon and transfromations.  The 
diagrams I would like to use with Connectors 2.0 would be larger than 
would fit at full scale on a monitor.  I am working with the released 
3.7 full image.  If the newer images deal with these issues please let 
me know.  The scope and nature of the issues make it hard to see moving 
forward with Squeak.

1) BalloonCanvas does not really provide transformed drawing, but 
rather transforms coordinates and draws to those new coordinates.  
There are numerous drawing methods that do not deal with 
transformations properly: all text drawing, framing of rectangles, 
others.
2) The performance is borderline.  Most of the time is spent in 
fastCopyLoop which does the rendering using primitives.  I have not 
looked at the primitives yet to see how optimal they are, but that 
would be an involved effort.
3) I am seeing some issues with fills in scaled areas as well.

The biggest issue is the handling of text.  While I have had some 
success substituting one TT font for another to get close to scaling, 
this does not produce real scaling.  I would have to replace the 
current use of cached bitmaps with rendering using outlines.  This 
would most likely require more performance work.

While Smalltalk makes many of these tasks possible, it represents work 
not related to the project.  It currently looks like a virtual rewrite 
of Balloon and font rendering would be required to achieve a graphics 
model like that found in PostScript, Quartz, or Java2D.

It is possible I will continue to "play" with Squeak, but using it on a 
project would yield more consistent time and motivation.

Michael