4.7, I though was only for the Storm/TouchScreen..
I'd at least guess to say, all the "next-gen" BB's to get 5.0 by the end of year. (Or by WES/CES/CTIA of next year, did RIM officially so anything about Device OS 5.0 they did ALOT of talk about BES 5.0 )
8830 -> 8330 -> 9550 -> 9650
Just think about how far BlackBerries have come from then till now... And what else is coming.