Couldn't you just do that from your end? Use some kind of queue and put a send_at timestamp?
Piers
This is actually sitting in a branch but was delayed a bit due to some
optimizations we've been working on. We'll see if we can get it
released in a few weeks. No promises right now, but we will let you
know. In short, it will allow you to set a future datetime for a
message and we send it out then.
Chris