remember these guys? There big gimmick was that the phone was built to be used in conjunction with MySpace. At the time I'm sure that seemed like a great idea.
http://en.wikipedia.org/wiki/Helio_(wireless_carrier)
I think the problem is you can't depend on these things sticking around for too long. Facebook has had a very long run by internet standards, which would lead me to believe it is more than half way through its lifespan by now. I'm just making assumptions, but I think you guys get my point.
iOS, Android, Windows, they all adapt to whatever is hip at the moment because you can install and delete apps in seconds. But having a phone that ties in to facebook raises a lot of questions. I would have my doubts as to what kind of 3rd party apps would/wouldn't be allowed. Not only that but since they are just now considering entering the mobile phone market, they are insanely behind the bar. By the time they got an actual product to market facebook might be the new livejournal.
Anyway, it is kind of sad to see RIM go. I used to love my blackberry back in the day. I used to have a very boring post at my job and that blackberry made life pretty sweet. Not to mention it had some features iOS STILL DOESN'T HAVE. I switched to iOS about 4 years ago (hard to believe) and I still miss that blackberry sometimes.
RIP RIM, you were a true pioneer.