Actually a lot of people have gotten rid of their home phones in favor of cell phones. Since pollsters are forbidden to call cell phones this skews any poll. I think this topic will be much discussed after the November election. BTW, have you noticed that is mostly older Democrat clueless types that don't use cell phones?
I am a Registered Democrat, and yeah, kind of an old guy but not entirely clueless due, in part, to paying a lot of attention to FreeRepublic these past 5+ years.
More important than cell phones is the "gate-keeper" phenomenom. People now use answering machines, voicemail and caller ID to screen their calls so that the pollsters never reach them. This has drastically reduced response rates to the point where "random" samples lose their randomness, and, therefore, their validity. Surveys should have a response rate of at least 50 percent and preferably 80%. Most now come in at under 20%. So they simply call more and more people and end up with a badly skewed set of responses.