Sorry for the delayed response, had some things keeping me from my computer over the weekend.
In response to devinemke, I'm not sure that I would need to wipe the standard every day, but I think it would be necessary because users are allowed to change their destinations up to a certain time each day... in my head, I can't figure out how to do what you are saying, but I also can't seem to explain why in words... I don't think "timestamping" would work, but at the same time, I can imagine a table that just continues to grow each day by creating new destinations for the current date... again, I don't really know what I need done here, so I'm kinda throwing out ideas and hoping someone catches one and can push me closer to what I need.
In response to bastien, I've heard of cron jobs, but know little about them. I'm running on a windows machine that is not my server because I'm paying for hosting, can I still do cron jobs? I thought I read they were only for *unix machines. Could you point me in the direction of a good tutorial or more information?