Walmart does even have it at all not even online.
It's still on shelves where I'm at.
I haven't seen it at any local Meijers lately. Last one I saw there was the one I bought back in mid-March at the one at Maple Road and Haggerty. Haven't seen any for months at Wixom & Grand River...a mere 7 miles from Stardock's offices... Meijer isn't exactly a PC game retailer (it's laughable) but it is a grocery superstore that carries most high profile games (but I never saw UT3 for PC there for some reason).
I find it a little irksome since the game deserves to be on that store's shelves and people can't buy it or some people at least won't find out about if it isn't on store shelves.