Disagree - Facebook will go with Microsoft.
So, facebook could go android on a mobile device?
No ways, no ways in hell is that going to happen - Google want a slice of that social pie, they've invested a lot first in the failed Buzz and now in Google+
They would put roadblocks in the way of facebook going android, big roadblocks.
I wouldn't say 'no love lost' between the two - that's conjecture - but there's a clear and present conflict of interests.
Facebook and microsoft is a far more logical marriage - and it may just be the saving grace microsoft need to gain a steady foothold in the mobile social space. It all depends whether microsoft are willing to offer Facebook a deal they can't refuse - and lets face it, why wouldn't they?
My money is on Zuck teaming up with Microsoft - and if it's done right, that gives both parties a very good fighting chance to gain serious ground with iOS and Android.
Zuck and Google? - sorry, can't see it myself.