The Cordless Dual Phone is an excellent idea. I was reading about these phones on VOIPConverse. They are really supportive of the RTX dualphone 3088. Of course we do have the RTX 3055 and 3058(Update: currently unavailable) but they are not quite the same "level of play" as the 3088.

Look at what VOIPConverse had to say about the dualphone 3088:

"In our opinion the RTX DUALphone 3088 is probably the best dual phone available on the market today. This superbly designed phone gives you the flexablity of of using both your existing landline and your broadband connection to make make calls from anywhere in your home without the need of a computer.

Making Skype to Skype free calls could not be easier as the liquid crystal display (LCD) shows all of your friends and contacts that are online. To call your friends and contacts who are not on a computer you can either make a Skype Out call buy purchasing credits or just use the RTX DUALphone as a normal PSTN phone.

The phone comes with a base station, a charging unit and has a stand-by time of up to 100 hours and a talk time of more than 10 hours. The range of the RTX cordless DUALphone is an impressive 300 meters from the base station, giving you the flexibility to use from anywhere in the home. The phone could not be easier to set-up coming with full step-by-step instructions."

VOIP communications with the skype wi-fi phone technology.