Companies will soon have to buy the electronic equivalent of a postage stamp if they want to be certain that their e-mail will be delivered to many of their customers.

America Online and Yahoo, two of the world’s largest providers of e-mail accounts, are about to start using a controversial system that gives preferential treatment to messages from companies that pay from 1/4 of a cent to a penny each to have them delivered. The senders must contact only people who have agreed to receive their messages, or risk being blocked entirely.

Detailed article — including a fair description of pros and cons. Y’all had better check it out because Congress will probably get involved. It doesn’t matter what side they start out on — they’re still liable to screw it up.