It would appear that BlackBerry App World will soon be arriving. Although it is not open yet, you can register now to know when it will be available. Purchasing must be made through PayPal, so you had best sign up for that, too. The requirements are that your smartphone must have an operating system of 4.2 or higher and have a trackball or SurePress touchscreen. RIM is also calling for applications so if you come up with one, let them know.