Robin Woods:
If cycling becomes such a dominant part of life after stream entry, how come shinzen never mentions it?
He talks about the maps at length here:
http://www.youtube.com/watch?v=8bIgTY-8M5ABasically, I think he acknowledges them but downplays their importance and emphasises the pitfalls of focsuing on them. I think he also says something to the effect that he's only ever known of one Arhat in his lifetime. So, his view diverges a bit. As I understand it, the maps describe real phenomena, but awareness of them can strengthen the expression of those phenomena which can then be used either skillfully or unskillfully.
Did the Buddha ever mention it?
I'd be interested if anyone has a reference that answers this.