I always chuckle when someone asks me for my office number. The only number that matters is my mobile. One number, always on, anywhere (pretty much) on the planet. By next month I suspect we will be using VOIP at home as well. Poytner.org just highlighted some interesting research that pretty much confirms the view that the US is a wireless backwater in terms of wireless to wireline dependency:~

A Connected Continent
Some interesting new facts on telephone usage in Europe from the “Telecoms Services Indicators 2004” report: The percentage of European households with at least one mobile telephone reached 81 percent in 2004. This puts mobile telephony on a par with households having at least one fixed telephone line.

In fact, more and more households have mobile phones and no fixed line at all. The average of households without any fixed line is already 15 percent, and this proportion reaches 33 percent in Finland and Portugal. (Only 3 percent of households have no phone at all).