It would be useful to export Spaces to e.g. JSON (best), CSV, or at least copy to the clipboard My Spaces list or structure if Nested spaces (for both display and search results) will be ever implemented.
Synopsis: Spaces used in MEMEX are similar to tags. One may use tags in several apps., notably WordPress, Browsers, else note-taking tools, etc. To keep track of tags consistency at least that would be useful to see a list of tags/Spaces used in MEMEX.
It is not required this feature gives a more sophisticated import ability into else applications!
Thanks for considering implementing it sooner.