Is RIM Acquistion Tumble.me headed for the Playbook?

Research In Motion is continuing its "development by acquisition" strategy as it announced today that the company has acquired calendar and scheduling application Tungle.me. The words "calendar" and "BlackBerry" have been together a lot recently. That is because RIM's new tablet, the BlackBerry PlayBook, shipped without a native calendar, contacts or email clients, all of which RIM has promised for "later this summer." There is no official word yet if RIM plans on integrating Tungle into the PlayBook but it would make a lot of sense.