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.
Snap to and/or draw hexagional grid.

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.
Implement Convert to 3D.

Longer term:
- Retrosynthesis
- Link to 3-D visualization programs of some sort
- Improved XML support -- standards like SAX and DOM...
