First of all - jcomments is a fantastic component - very slick and feels just right. Great job!
I've been trying to get it working with other components and after some researching I've managed to do that, but the "latest comments" module is giving me some trouble.
1) I recommend updating the description tooltip for "Source" parameter for "latest comments" module like this:
Component or components to display comments from. Separate with comma only eg 'com_content,com_second,com_third'
That would certainly cut some traffic for your forum

2) Now the major pain - comments from other components (docman and jevents in my case) are displayed whithout article titles and the links are not working, as opposite for comments from com_content. Is there any way to fix that?