Personally, I don't see Apple pricing the iPad mini with $100 between the cost of an 8gb and a 16gb...
Look at the 8/16gb nanos. The price difference is 20$ for the SAME increase.
I think you are spot on for the shuffle, nano, iPad 2/3 and touch.
I also think your idea of them pricing the iPad mini at $279 is realistic!
I however think that the iPad mini will be as follows:
8gb - $249.99 (maybe $279 like you say).
16gb - $299.99 (maybe $319 - but sounds very weird as a price!).
If they have LTE variants (which I am personally unsure about them actually having) I think they will be $100 more than the non-LTE device.
I also don't think they would have 3 storage capacities to choose from, but obviously all of my thoughts are speculation based on what I 'feel' will happen!
Either way, can't wait to see the stuff
releases!!
Also, in reply to the other person who wrote about the iPhone being an iOS device, in the US it'll probably be...
$0 for iPhone 4 8gb
$99 for iPhone 4S 8gb
$199/$299/$399 for new iPhone in 16/32/64gb configurations