The 2156 is now discontinued and removed from the most recent Jonsered price list. (07/15/12) My guess is that we will see the 2258/2260 before too long here in the US. My gut feeling is by October, but I have nothing concrete to go on.
From pics we've seen, I think the overall shape of these new saw chassis work better in the Jonny colors than on the uskys. Not just the colors, but the way the starter "continues" into the top cover has a more integrated look to it.