Great extension but as usual the non-programming users have some more wishes ;) Only four stars, because: Unfortunately, you come with your own comment system. Thats fine but if on the rest of your site you use another comment system you have to restructure the whole site and/or delete exisitng comments. Second point, why is there no option to edit an article from front-end? I would give six or even more stars if the functionality this extension offers would complement the already existing functionality of the standard Joomla! installation. That's, btw, a deficit I also encountered with other CCKs. Apart from that: I very much admire the work you guys do for FREE for us! Thanks a lot!!
K2 DOES have frontend editing. You just need to enable it in the component's parameters and then make sure that users have the right permissions to do so. If they do, when they are logged in the will see add/edit links. Additionally, if you publish mod_k2_login it will add a nice "user toolbar" with more functionality, like frontend comment editing. ;)