From a friend who works for a cell phone company...

In a few weeks, cell phone numbers are being released to telemarketing companies and you will start to receive sales calls. Call this number (must be from your cell phone) 888-382-1222. It is the national Do Not Call list. It blocks your number for 5 years. Please pass this information on to anyone you know.

update: You can also use a web site to do this www.donotcall.gov. -via brian

more updates:

A directory of cell phone numbers will soon be published. - Urban Legend

the gist of the message...is correct in alerting consumers to a proposed directory of cell phone numbers, it is misleading in stating that such a directory will "soon be published" (the word "published" implies making a printed directory available, which the wireless consortium maintains they will not do) and in directing readers to sign up with the The National Do Not Call Registry. The latter step will not keep wireless customer listings out of the proposed Wireless 411 database -- it will only add their phone numbers to a list of numbers off-limits to most telemarketers, a step which is premature (because the Wireless 411 directory has not yet been implemented) and largely unnecessary (because the Wireless 411 directory information is not supposed to be supplied to telemarketers, and because FCC regulations already in place block the bulk of telemarketing calls to cell phones).

- via ben