Next BlackBerry gunning for the Treo 600?

The Inquirer says that Research In Motion is planning to come out with a new BlackBerry, codenamed "Charm", that'll be thinner and less clunky than their current lineup of handhelds (like the BlackBerry 7280, pictured at right), and be easier to use as a phone. Could they be gunning for palmOne's Treo 600?