His days of a top 10 RB are over.
I doubt that. His days in the top five are likely behind him, but I think it likely that he'll get enough touches in Arizona to rank in, or very close to, the top ten. Further, although Arizona's ground game was among the league's worst last year, their passing attack is among the best. I think that Edge will find enough room to put up some solid numbers. He likely won't be as effective per touch as he was in Indy, but he won't be completely shut down, either.I would not be at all surprised to see him end up with around 400 total touches in 2006, which would certainly be enough for him to push top ten status among fantasy RBs.
As far as his long term prospects go, he is reaching the point where a decline is becoming more and more likely. He has been used very extensively thus far in his career, and will likely be among the league leaders in total touches yet again. I would guess that he'll start to slow down within the next two years or so.