This script "extracts" a curve from a multiple selection of continuous polygon edges. It creates a linear or cubic curve with a CV for every vertex of the selection. It creates closed curves, too. The minimum selection size is 2 edges for a linear curve (3 for a closed one) and 3 for a cubic curve (4 for closed).
  mm_curveFromEdges.mel was tested on Maya 7 and 8.5 on Windows and Linux. It was tested and works on OSX, too, thanks to Sifis.

- renamed the script and the main procedure the same way, for easy sourcing: mm_curveFromEdgesGUI[.mel] (thanks for reporting to Jeannie).