The Kunena Forum extension easily integrates in the JomSocial network (besides, you've got our JS G-KUNENA extension to improve that integration). Anyhow, there's still a pending issue: when you integrate Kunena in the JomSocial activities stream, the link to the user post doesn't really point to the user point but to the thread home.
It can be very disappointing when you want to check the user participation by cliking on the link, but then you still have to look for it. Also, when you use our JS FACE extension to integrate JomSocial into Facebook, Facebook users can preview the Kunena forum post, but when they click on the post link they go somewhere else (to the begining of the thread, instead).

On both the Kunena and the JomSocial support forums, they say this can't be done at the moment, but we've tested a little trick that works fine for us, and it will probably work fine for you also. It has been tested for Kunena 1.5.9, but it'll surely work on recent versions.
This is what you have to do:
1.- Open the post.php file under the components/com_kunena/template/default folder.
2.- Look for the text "//activity stream - reply post" (this is what gets done when a new reply post is submitted).
3.- Change the line below, from:
$JSPostLink = CKunenaLink::GetThreadPageURL($fbConfig, 'view', $catid, $thread, 1);
to:
$JSPostLink = CKunenaLink::GetThreadPageURL($fbConfig, 'view', $catid, $pid, 1);
This is it!!
As you can see, you only need to change the $thread variable with the $pid one.
Please let us know if this has worked for you.