I did a double-take when looking at Hornady's latest catalog they mailed me. In the back is a section for custom dies, where they want you to let them build "anything you need".
Pictured there is a hydraulic forming die, that is cut away so you can see the inside.
WELL... looking around on the reloading forums, this seems to be an easy case forming method that is overlooked. It takes a hammer, some medium-weight oil (refrigerator pump oil is mentioned) and some time.
The "garage" method seems to be that a full-length forming die is used, and either a cap or a base plate is used. The ram one person mentioned was to use a fiberglass rod, and a bullet turned upside-down and stuck into the case neck. Then "a few whacks with the hammer" and you're done.
This sounds like a nice, easy alternative to fireforming with powder, no?