I've used this for marketing before, and thought it may help some time poor students- write a few blogs on the weekend, and spread them out to be automatically sent by hootsuite when you choose. Could be very handy! Would work in a classroom, if you knew every Wednesday was sports day, and your students were on twitter, have an automated tweet go out every Tuesday night to remind them to wear sports uniform/bring sports equipment. Great opportunities to be connected without having to remember regularly!