Seeing as @Decanter so kindly asked for features people miss for the new wiki, I figured I'd make a thread.
Personally, I'd like to be able to see footnotes in hover text.
I have enabled page previews and reference previews, however reference previews only show up if you are logged in due to it being a beta feature. (Users without a login will only be able to see page previews, not reference previews)
Would be great to have a quick link to the forum on the list on the left of every page.
Done. In general, I need to devote more thought to the sidebar (it's on the todo list).