BBM for iPhone and Android will initially include chat, photo and voice note sharing, multi-person chats with up to 30 people, and the ability to post status updates and personal messages. However, BlackBerry says the apps will get BBM Channels in a future updates:
BBM will continue to evolve quickly. Later this year, BBM Channels will provide a forum for active, real conversations between you and the people, brands, celebrities, artists, service providers, communities and more, that matter to you. By creating a Channel, individuals and brands can engage their friends and communities in conversations sparked by their thoughts, ideas and passions. Subscribing to a Channel will let you join conversations with people who share your interests. In addition, BBM Video calling and BBM Voice calling are planned for availability for Android and iPhone in a future version.