I bought one yesterday, and can confirm that it works. The first thing I did was upgrade the PTV firmware, and also performed a hard reset while messing around with it to be on the safe side.
It does have some issues with discovery, usually solved by disabling then re-enabling WiFi on the SP2.
I had some teething troubles trying to get 1080p out of it, but this turned out to be a HDMI handshake issue, resolved by modifying my home theatre cabling.