Research In Motion on Wednesday announced a new version of its on-device software store for BlackBerry smartphones, BlackBerry App World. Version 2.1 brings several changes to RIM’s app store — the most notable of which is the introduction of an in-app payment mechanism. BlackBerry app developers will now be able to offer digital and virtual goods to users from within their apps, and payments will be taken and processed by RIM’s new payment service. A related SDK has been released to developers, allowing them to build the new in-app purchase functionality into their existing apps.