In RIM's present stage they would never make a device with Android os and tbh they don't really need to. Personally having the Android market on a BlackBerry would be AMAZING but besides that im happy with BB7 & future QNX. As for an Android with BBM there was talks about that early on this year... What ever happened to that?
I prefer the Blackberry OS for phone calling, messaging and day to day use. But I would welcome an Android Player for those odd programs that aren't yet available for my Blackberry.
I wouldn't want it to happen on the principle: RIM, or any self-respecting company should stand on its own two feet. Now, I know they purchased QNX, and all, but I'm sure RIM will tailor the heck out of it for phones.