After reading Bill's woes with SPIN/SPOUT and the deployment in general, I figured he isn't the only one who needs to know this:
There is an excellent deployment tool which assists both in migrations and deployments, and can take most of the pain out of the process. I highly recommend giving it a look if you need to work with a Sharepoint deployment of any size. From the website:
The K-Wise Deployer is a stand-alone environment designed for the rapid migration of documents from multiple sources into SharePoint Portal Server.
Note: This is probably the most shameless product plug I've ever written, but hey - I love this tool.