I set up a test environment to play with this new plugin. I'm using the latest versions of TNG and WP and plugin v0.25.2.
A few problems I've noted so far:
New User registration via WordPress creates a record in TNG database, but that user does not show up in TNG Admin>Users. Therefore User Rights cannot be governed from within TNG.
Within TNG Admin, the vertical menu link, “Admin Home” (at the top of the page), loads the Admin index page within a WordPress page. If the horizontal menu link “Admin Home” (on the TNG left sidebar menu) is used, the page displays the same as it does if the WP TNG Admin link is used.
WP/TNG pages contain multiple validation errors on default template. I haven't tweaked any CSS in either TNG or my chosen WP theme.
Thanks for the hard work Mark, it's a good start :).