So, did Sony underestimate demand for that? I decided to get one as it's basically the price of a game but I can't find one anywhere. Weird considering that it's just an add-on.

They are hard to find in the Philadelphia area too.

I remember seeing one in Wal-Mart the other day and being surprised on how tiny it was. It honestly looked like a cheap chinese rip off toy from a cereal box.

I picked one up the day after launch and was just looking around and didn't realize they were in such demand right now. In doing a quick search around some of the major online retailers, I can't believe no one has one. Well, there are some people on Amazon trying to get double the price for one, but seriously, it is NOT worth that with what it can do right now.

Maybe Sony just didn't think it would be that big of a seller.

Yupp, surprised that it's sold out everywhere. I guess a lot of people want to stream with it. That's good though because it means Sony will do more with it. I want one but don't have the money (& it's sold out) but I plan on getting one. I have used the voice controls with the earpiece the PS4 comes with and it works pretty well. More voice controls would do wonders for people who rather say 2 words then navigate a UI like me.