Went to a local store this a.m. At 10:00 a.m. they told me they were out of stock. But they didn't tell me that until I repeatedly refused to buy their accessory packs of things I don't need. I suspect they had plenty for people who were going to buy overpriced accessories. By the time I got back home, their web site had crashed. It eventually came back, but... I have a business account, with no activation fees, but the web site insisted on charging me a $36 fee on each of two phones. So I had to make multiple phone calls to get through to business CS. But I finally got the phones ordered.
An hour later I got an email telling me they were out of stock, but more were expected "shortly." I think Sprint totally underestimated the demand for $50 GS3s.