Could you go to The Running-R Ranch in Texas, where there is no internet access, and no cell phone towers?
Would you pay $150+/night at the Sheraton Chicago if they confiscate your Blackberry? Trade up to a paper walking map of Chicago and sign up for their 48-hour Blackberry Detox Challenge.
The Canadian Spa Eastman, an hour from Montreal advertises unplugging as part of their philosophy. Cell phones? Leave 'em at home.
The Tassajara Zen M0untain Center in Carmel Valley has only one public phone, no cell phone reception, and no Internet connection. In fact, don't plan on bringing any gadgets that require charging: Only a few of the cabins have the electricity you'll need to stay in touch. Even more discouraging for tech addicts, the center charges $10 an hour to recharge devices. So how will you fill up all the time you'll be saving by not answering emails? Take a relaxing soak in the bathhouse with water from a local hot spring, or sign up for a retreat covering such subjects as yoga, gardening, and cooking. Failing that, you can just hang out and do nothing: The Tassajara Zen Mountain Center is a functioning monastery for serious students of Buddhism, with free meditation instruction at 4 P.M. daily, but you're free to do as you please.
If you go -- send me a postcard!!
