Cool guide, but I think the E-3's dual intent rules are a bit weird:

http://www.uscis.gov/sites/default/files/USCIS/Laws/Memorand...

"An application for initial admission, change of status or extension of stay in E-3 classification, however, may not be denied solely on the basis of an approved request for permanent labor certification or a filed or approved immigrant visa preference petition."

It's not explicitly dual intent but the memo makes it clear that they won't kick you out for pursuing PR.