Let's use Unknown. We can change the word to something else later if a better idea comes along.
Gotcha on the type-ahead. Any pulldown will automatically support skipping ahead by pressing the first letter. That won't be a problem.
We just need to know what fields we want allowable in that pulldown. Do you have a list? I imagine it would be a short list to start off with, and it'll grow as more get requested to be added.
