I have been playing with Balloon for several days and encountered 
several issues.  I would like input on how to proceed.

1) The 3.7 image I am working from does not support transformed text.  
If you try using a TransformMorph that encloses text it does not draw.
2) The TTCFont only deals with integral pixel glyphs.  While this makes 
sense since it caches forms for each glyph, it means that smooth 
scaling of text is not possible.

I would like to see a system that has fractional text metrics.  It 
looks like this can be done with a different font class using the same 
TT descriptors as TTCFont.  I presume I should work with my own font 
class as there is likely to be a performance issue relative to the 
cached fonts currently in use, at least for a while.  Handling of the 
scaling of text requires changes to the canvas class.  Should I create 
a subclass of BalloonCanvas?  This seems the safest approach, but means 
that this feature will not be available in places where a BalloonCanvas 
is currently used.  Since no one has missed this feature so far, I 
guess this is not an issue for anyone.  It is not clear if the plug-in 
can handle glyphs that start at fractional positions, I am hoping this 
is not an issue, only time will tell.

Let me know what you think.  If I do all my work in subclasses then of 
course I can package it more easily.  But, then things get bigger when 
the package is loaded.

Michael