Three months ago appeared rumors that pointed to that RIM was working on a version of BB Messenger for other operating systems: including Android. Since then he has not returned to have news of the affair and now seems to be the own Google that is ready to move.
According to a source of Androinica Google would be working in a exclusive messaging service similar to BB Messenger Android. Perhaps some think “Android already have GTalk” but it seems that the application will have more options, such as those offered by RIM.
At the moment they are just rumors but, and this is a personal opinion, I think that to make a unique messaging client depending on the operating system very limited contacts network. Precisely applications like Whatsapp – despite its questionable security measures – have succeeded thanks to be multiplatform.