to fix immediately:
Improve printing of diagrams.
Debug label drawing.  (connected to above)
(Improve) Compute pKa's of functional groups.
Add more lone pair/orbital symbols.
Fix empirical formula calc.

for 1.7.x:
Implement a more sensible event dispatcher for drawing events, partly to
  make the code more efficient and also to have a working Undo.
Re-implement hydrogens and label correction as some sort of structure
  validation tool.
Fix EPS and printing.
Move to per-point selection rather than per-object to make slecting and
  moving a little more flexible.

Longer term:
- Improve interoperability with OpenBabel (perhaps abolishing my custom
  Molecule classes in favor of OBMol)
- Browser plugin (Mozilla for Linux/MacOSX, .NET on Windows)
- Retrosynthesis
- Implement Convert to 3D.
- Link to 3-D visualization programs of some sort
- Improved XML support -- standards like SAX and DOM...
