In keeping with my earlier promise to start posting functional yet somewhat incomplete code, here's a link to a relaydelay front end. I've posted some of this code before, but there are some new additions.
Most of this code is the result of a joint effort between myself and Matt Prigge. This isn't an official package, but there is a README in the root of the tarball that will get you started, and some assembly is definitely required. If there's enough demand, I might throw together an installer and other associated code, but for now this is it.