I want to write a ColdFusion program that sends an email to a list of people whenever a particular column in a database is edited. I know how to do this, but I want it to run automatically everyday, rather than me having to run it myself. Is there a way to do this??

Yes, this is very possible. ColdFusion gives you the ability to set up scheduled tasks that run regularly on the server. Check under the ColdFusion Administrator under Debugging & Logging for Scheduled Tasks. If you are using a shared host, contact them to set up a scheduled task for you.