If you do not get enough time to watch TV and find yourself in need of some quiet time in the tub, the Sony XDV-W600 is right up your alley. The portable TV is waterproof and meets IPX 7 and IPX 6 specs, which means it can safely go three feet under for half an hour.
The screen is 4 inches and can record to the internal 2Gb of memory. The life without a plug lasts up to 23 hours and is supplied by 4 AA batteries.
The dock cannot be submerged, but does have a hole for water to drain out. The dock also has a coaxial cable input for your signal as well as ac power to charge the device.
The downside is we are unlikely to see this in the US as the digital standard is not what we have here in the States.