While I personally am not totally convinced of the value of being able to take an ECG of yourself, I have to admit that it is pretty cool technology. AliveCor has not yet released the device to the public, but according to their website they will be exhibiting at MEDICA 2011 in Dusseldorf Germany from Nov 16-19.
The following two videos give a much better description of the device then I ever could so I will let them describe it.
Like many of the devices similar to this I really feel like they are of the most value in underdeveloped countries. These places will not have ECG’s all over the place like we do here in America. Making it possible for more experienced doctors to monitor patients with tools like an ECG will greatly improve the quality of care that they receive.