Save when cell is changed?

Is it possible to save a workbook whenever any changes are made to any cell in a specific column?

The reason - I'm putting an excel workbook out on a network drive for 4-5people to share. The sheet contains work items which are imported every 4 hours... Column A contains the status.

I want to save the file every time anybody changes a status to prevent multiple users from working on the same item.

I realize that I could build a form then load each workitem into the form, then apply the save to a change event on the field/control, but that's something for next week - I need to get this out the door, bare bones, as soon as possible.

Any help is greatly appreciated!