Ok, so I went to my local Harris-Teeter last night to stock up on yogurts for the week. It's been a couple of weeks since I've been there, but it looks like there are a half-dozen brands that I had never seen before.
Not just various Greek yogurts, but icelandic, swiss, and some other countries as well. Plus variations on the old standbys -- Dannon, Stonyfield, etc. There's even an H-T "greek" style yogurt now.
I guess this is a good trend, but it seems to have happened so quickly.
So I am, for now, trying them based on two criteria -- price and protein content.