We’ve open sourced the Poorbuthappy one-click deploy code. It’s still rough, but it’s a start. I’ll try to work on the documentation soon, which is probably the most important bit. http://code.google.com/p/one-click-deploy/
One-click deploy is one of the greatest things I’ve ever added (Chris added it really): it’s like versioning: once you start, you’ll never go back.