I hate to spread rumors .... but this one's good. Maybe too good to be true. I like the idea of tethering — connecting your laptop to the Internet via your phone's data capability when there's no Wi-Fi or other connection available. It's been rumored for some time now that AT&T and Apple are planning to make this available for an additional monthly charge of $30. Ouch. Now MacBlogz, which has been a major source for these rumors, is saying that the price per month may be as little as $10.