So, currently it appears you can only specify ONE SPECIFIC POST at a time with post_id='#'. If this is not the case, my apologies. But that's the impression I got from the Install / FAQ pages.
Basically, that means that if you want to add multiple posts/pages to the same post/page, you'd have to write multiple shortcodes to do it.
What I'd like to be able to do is to specify arbitrarily many specific pages + order in a single shortcode entry.
So, it seems like adding an option for multiple post IDs (so as not to break any shortcodes using the existing single post_ID parameter) would be handy.
My thought is that order SHOULD matter. So, post_ids='1,2,3,4' would render them in the order 1,2,3,4 whereas post_ids='2,4,1,3' would render them in the order 2,4,1,3 on the page instead.
This would be very handy for making a single page out of multiple other pages!