I know one thing, I ordered a V-ride 3-11-06 and I still don't have it!!!!! They say it will come in soon though. I think after July the 07 will be out. You better order it now if you want it by next summer.
o7 production starts in July, so they are probably just wrapping up the last few 06's. I saw a pic of the new rides and they have new graphics. Personally I like the 06 graphics more, but we will see what they are like in person. I think other than that there are no changes.