The latest entrant in the sous vide machine market is Mellow, a self-contained sous vide machine. The units are comparably priced to a Sous Vide Supreme at $400 and are shipping in about a year.
I think it's biggest benefit is the ability to keep foods at refrigerator temperature, so you could place your food in the machine in the morning, and it would start cooking later in the day. It's also got wireless controls for both iPhone and Android devices and it looks pretty sleek.
I'm hoping to get my hands on one to give you more detailed impressions later in the year and I'll keep you informed as I get more information.