While the landing pages just indicate BBM for Android and iPhone is coming “very soon” unfortunately it is not yet available. BlackBerry had recently published the user guides which were quickly pulled but now we know they have been working on this internally and getting very close to launch.
Check out the landing pages and FAQs for BBM going cross-platform:
Let us know if you find out any other updates on this page as you could see some images are cut off still.
Source: BerryReview