The Pew Internet and American Life Project reports that 73% of U.S. adults are Internet users, broadband connectivity lags at 42% of all adults. (Link to report here - pdf.)

The figures represent an increase from 66 percent, or 133 million
adults, in January 2005, according to the Pew Internet and American
Life Project.

In a report Wednesday, Pew noted that Internet use still varies with age and income. Eighty-eight percent of adults under 30 go online, compared with 32 percent for those age 65 and older. Only 53 percent of adults in households earning less than $30,000 a
year use the Internet, compared with 91 percent in households with
annual income exceeding $75,000.

While wireless Internet access from the home is one way to provide remote monitoring, for many applications I think wireless offers a better solution. Connectivity shouldn't be a major barrier to adoption, it should be invisible. Wired or wireless, Internet adoption trends are good news for remote monitoring.