There seem to be two ways to make a Wi-Fi-enabled camera. The first is to build an actual camera and add a Wi-Fi radio. The second is to make an iPod Touch with a decent 5MP camera module inside. Depending on your requirements, either one can be great.
But there now appears to be a third way. Samsung has taken a camera, added an Android phone, and then taken away the phone part of that phone. Behold! The Wi-Fi Galaxy Camera.