It’s me again,
First, on the support.js-kit page someone has written:
Echo is still available 4 Free, LogIn @ http://js-kit.com & u’ll automatically redirected 2 http://js-kit.com/moderate/ where u can make ur settings & get the code 
So, a free version is still available. Good! Not that I begrudge the $12.00, but I wanted to try it out before I paid any money.
Next, Philippe Cailloux, an employee of js-kit has posted a guide with instructions for RapidWeaver users.
In this he’s got two lines of code to be pasted at the bottom of each post:
<div class='js-kit-comments' permalink=''></div>
<div class='js-kit-comments' permalink='UNIQ_TO_POST_PERMALINK' uniq='/POST_TITLE'></div>
Do we really paste both of these lines at the bottom of each post? They seem identical except the second is a more concrete example.
And is the “uniq” (a new term to me) simply a name I give my post in RapidWeaver under Permalink? For example, if I write a post titled “Painting my house” and give it the permalink of “house,” my pasted code would look like this:
<div class='js-kit-comments' permalink='house' uniq='Painting_my_house'></div>
And that would be it, at least for that post? If the answer to this is “yes” then I think I understand. If it’s “no,” I’m totally befuddled.
And of course we’re to check “Enable Comments” under the General tab of the Page Inspector.
Sorry for these basic questions… all this html stuff is new to me as of a couple of weeks ago!
Christopher