I've written up a couple recently:
This one
http://ps-scripts.com/bb/viewtopic.php?t=344 goes over several different ways to use File.execute to call out and execute external programs.
This one
http://ps-scripts.com/bb/viewtopic.php?t=340 goes into detail on how to use the Getter.jsx component of my library (XToolkit) to access properties that are otherwise not available. The example used shows how to determine if a layer mask is linked to the image.
I'll be writing more and I'll drop a note here as they're done.
ciao,
-X