Automation dependent on what point users abandon a form

Liz, underlying this goal is what we on the tech side call a "Dead man's switch" problem.

To quote myself from another Nation thread:

Dead man's switch refers to the impossibility of determining that a person or device has stopped doing something if you don't have some kind of external observer. When that "something" is "filling out fields," it should make sense that the same device that stopped can't always tell you that it stopped, depending on how gracefully it stopped (close browser, crash browser, navigate away from the page, etc). Think about the difference between a train engineer radioing "I'm about to pass out" and simply passing out, which is what the original Dead man's switch technology was for.

With a Marketo form, in order to track each field as it gets filled out, you can wire up a synthetic Munchkin function (Munchkin.munchkinFunction("visitWebPage");) to fire when a field changes.  But I'd be very cautious about the overhead this will cause on your instance. Consider limiting the "interesting" fields to only a few that you want to know if someone started filling out. Marketo, at the present time, isn't equipped for the massive increase in traffic you'd get by sending an update for every field. (It's equivalent to every page view being multiplied by N additional Munchkin hits.)