Never one to rebuild a wheel that already rolls pretty well, I googled around and found Chirrup; supposedly a simple javascripted system which I could drop in pretty damn easily. Only it didn't work. When I went looking for support I noticed that the guy who made Chirrup actually uses a system called Disqusto handle comments on his own blog.
So I've integrated Disqus into the site. Yay! It allows people to log in using facebook, twitter, openid or Disqus' own user authentication system. Or even guests (I'll see how this goes, I hate spam). It also has a very slick moderation / admin system and by being externally hosted it fits into my basic goal here on the lifestream; for it to be as portable to a new webhost as possible.