The HZ25W (WB5000 in Europe) was released in Sept of 09.
The reviews I found, rate the camera high.

Samsung probably only shipped a certain number to the USA.
And they sold out.

I guess it was more popular than they estimated.

Samsung camera distribution in the USA is still a work in progress.
Hopefully they will get it together soon.

Keep watching, Samsung just may release an updated model in Sept of 2010.