Just thought I'd share with you something I finally found!
http://extensions.joomla.org/extensions ... ions/12770
This is a plugin that lets you use JComments with K2, rather than the standard K2 Comments.
The best thing about JComments for me is that people can be "Notified of Updates", when others comment on the same material.
I installed it on my Memovie, Corporate 2 and PartyFreak templates and it worked perfectly. Picked up the GK_Style CSS and everything!
And it uses the JComments interface in the Admin backend to administer the comments.
I hope someone else finds this useful, as there are a few hack-solutions out there but this is a straight install in the Admin backend, enable the plugin and off you go!