It'd be difficult for me to justify a service like this over Mandrill. I saw where you compare them, but I don't find myself writing much "mailer code" (assuming this means what I think it means?) and I certainly don't have to make code changes just to change a template.

They also allow scheduled sending, though changing this would require a code change (minor, but honestly, this seems like the kind of thing I'd like to have in version control).

As far as email, it sounds like you're mostly providing what Mandrill is, but with a bit more abstraction. I'm really interested in seeing what you do with push/SMS though, because having all of that integrated into one platform sounds like a real value add.

I'd enjoy discussing this in depth with you if you'd like, email's in my profile.