mattwnz:
It is really amazing that they are still selling the ipad 2, and pressume they will keep selling it for the next year too. I still have one, and it performs well, but it is old in terms of it's age. I think the only reason they still have it is becuase of the ipad mini, which is basically the same hardware spec.
I think the only reason they are still producing, selling and supporting the iPad 2 is that its the iPad that has had the most sales AND is the version that they sold heavily into schools and business. Both the education and business sectors baulk at being forced to pay out for updated hardware when the hardware they invested in is still working well for them.
A friend in the US told me (I don't know how accurately) that his school introduced iPads a few months after iPad 2 was released, on an undertaking from Apple that they would be supported for 5 years. Anything could happen with Apple but the way things are going now with iPad 2 I wouldn't be at all surprised if they don't have a five-year life.