RIM pushed out a document for all you developers out there that have been wondering why is difficult at times to get apps approved in BlackBerry App World. RIM recognizes that the contributions of application developers are fundamental to the success of the BlackBerry App World™. You are a key partner in delivering the best application discovery experience of high quality offerings for BlackBerry users while simultaneously gaining significant exposure and placement.
Applications submitted to BlackBerry App World™ must comply with the BlackBerry App World Vendor Guidelines available at https://appworld.blackberry.com/isvportal/guidelines.do. The following is an additional resource which may assist you in developing applications (and/or content) which are appropriate for submission to BlackBerry App World™. A new app may push certain boundaries and trigger new rules and guidelines so keep in mind that RIM reserves the right to accept, deny or remove any application from BlackBerry App World™ at any time.
Check out the PDF document provided by the RIM development team here.