My friend and I have a flag football league at our college, and we would like to know how to setup mail so that it automatically sends at e-mail every week at a specific time. Can anyone help with this?
You can do that, but it is limited in that iCal will only send reminders to an e-mail address in the "ME" card in Address Book -- not to arbitrary e-mail addresses, at least, not without a hack of some kind.
You could also use cron and the command-line program "mail" to send this. That would go out from your computer, but would not appear in your "sent messages", and might not make it to some addresses (since it is you computer sending it directly).