I really like the idea of a queue. Sometimes I take a bunch of photos at once but don't want to flood the Instagram stream, or my followers, but I really love a particular crop/filter I apply (esp if I take a photo in-app & don't have save original to camera roll enabled).
totally agree, I was about to add this so I'm glad you posted it.
I think the ability to modify the sharing settings after the fact is what I'd really like.
So for example, I can choose to add an additional site in addition to what I might have selected earlier. or remove it (if that's possible). Or maybe I forgot to turn on the sharing features at all, and I want to do it now but I don't want to repost the same picture twice to the instagram photostream...