Well, I've made the decision to make the move of my vintage photograph collection final. Haven't heard back yet from the ipernity administrators about my questions, but I'm assuming from the Member Guidelines that I won't have any problems posting my vintage photos. The guidelines state: Be the author of any content that you publish (or make sure you own explicitly the dedicated rights to publish it).

I've added this statement to my profile: PLEASE NOTE: I am the owner of all of the vintage photographs that I have scanned and posted on ipernity. To the extent that any copyright exists, it is mine. 

Hopefully this covers it. 

I've put a message on my Flickr site letting people know that my collection is here.

Interesting that exactly 3 years ago today I started using Flickr to share my collection. Glad I've found a new home.