RFID enabled cell phones in your future?

Word from research firms is that by 2009 half of all cell phones will be able to read RFID tags. RFID is the bugaboo technology privacy advocates hate and manufacturers love. They're cheap, disposable tags that contain detailed information about a product and can be read with – you guessed it – RFID tag readers. "What's so great about that?" you ask? Well, how about scanning anything in a store with your phone and punching a button to purchase it? On your way out the RFID readers in the doorway read what you've got on your person, and see what you've paid for. No more check out lines, and that's just a start of what's possible. Of course, the downside is that the store (and anyone they decide to sell the information to) knows what you bought, when, where, and for how much... But hey, what's privacy for a little convenience, right?