I hadn't heard about AppHarbor, that's one project I might use. The one I'm definitely going to try out is Sendoid, as I mentioned in another comment, it hits

I hadn't heard about AppHarbor, that's one project I might use. The one I'm definitely going to try out is Sendoid, as I mentioned in another comment, it hits a pain point, and a friend had been bugging me to make something like it for 2 years already...