Um, yup. You basically explained it to yourself as simply as you possibly can. (I have an Acronis rep pestering me weekly now as I trialed their software here at work and mentioned it may have uses here...)
Basically - you can use Snap Deploy as intended, however EVERY machine that has a snap deploy image on it. How fun is that?
As far as alternatives, we're using RIS here. You have a Win2k3 server, just use RIS.