thanks. I didn't know about the & char allowing multiple conditions. I had just figured it only let you do one expression at a time.
I searched for spawners that had "" for regionname, and it seems that none of them do. They all begin with (-null-) when created or imported on our shard.
I don't know why regionname ! (-null-) wasn't working before, but it worked when I put regionname ! (-null-) & regionname ! "" so whatever.
I'll have to remember to add this info to the xmlfind tutorial I have on our forum. (I had to make some super-basic tutorials for our staff... some of them can't seem to figure anything out on their own.)