I looked into Interchange a couple of months ago and I found it very painful to install and set up. I finally got it running because I was too stubborn to give up but the experience made me reject Interchange for the project. I figured if it was that difficult to install and configure, maintenance wasn't going to be any better. My point here is that I don't think Interchange meets Ovid's description of Maypole as "designed to allow you to write complex database driven Web applications very quickly".