Two more things of note about the above example:
1. The webURL is commented out b/c I was testing on the root. Would I still need a WebURL attribute here? If so, would it point to central admin since that's where user profile properties live?
2. The type of my custom column is string even though I'm plugging in a number.
3. I also ensured my custom property is "replicable", although I'm not sure if it matters.
