+1 for this feature to be added.
I’m looking to get a list of all Tags in a Relationship-style of field, where the chosen list of tags can then be reordered, as we can with Posts currently.
Like RichB, the Taxonomy checklist/multiple select only gets me half way there.
I’ve been playing with the code in the link you provided Elliot but I am not having much luck so far.
Fingers crossed this will be added soon!