Allow interaction between slideshow/thumbnails so that both pages can have other content too.
I would like to have pages that have on them a slideshow but also other content blocks with other text, such as a paragraph about the subject of the slideshow or navigation on a sidebar, etc.
Then also a button to the thumbnails. And on the thumbnails page, also content blocks along with the thumbnails. Then to be able to click on a thumbnail to bring you back to the slideshow page at that image in the slideshow.
For example, see this page by another photographer:
You see that she has her sidebar navigation on both the slideshow page and thumbnails page. (And also probably she could add text above/under/around her slideshow and her thumbnails, if she wanted to do that.)
But this is not possible now in SmugMug.
It's such an elegant, simple, and basic approach to presenting photographs, and you see it on the web very often.
I can't imagine why this isn't already enabled in SmugMug.