Along with a number of tweeks that I think need to be done for the email marketing section (see ideas about merge fields, email addresses, etc.) I would love to be able to set up a recurring email schedule.  So that once a month we could send an email to brand new donors and we wouldn't have to schedule each month just after the last one was sent we could just set it up to pull a list of all new donors for the past month and send it out on the first day of each month.  So you can set it and "forget it".