As the number of Tasks increases the Task List becomes difficult to manage

Add the ability to tag or "star" a post. Posts that I star, and posts by me that others star, show up in my profile. This could be integrated with badges by providing "multi-stars", in other words, a marker associated with each badge. This way, items that receive that marker would be sorted under the badges that one is working on.

I did not feel the interface was very clear or inviting. Who are you, what do you do, why do I care, how can I participate - questions unanswered.

It's a bit tricky to find the button that leads to the full description of the course. I think it should be a prominent feature that you notice as soon as you sign on. Thanks!

It would help if there were set of videos that orientate a new user/student on how to use the site.

Let me get to my course page in one click, immediately after I log in. I don't even know where to find them at first once I log in to p2pu.org

I have been told twice to use the Post Comment button on my Task page in order to submit responses to Tasks. THERE IS NO SUCH BUTTON. Anyone else have this trouble? I'm in the Beta version.

Site loads slowly, it is too cluttered and comments take forever to post

With a way to discuss and improve each snippet

When I view my tasks:
http://p2pu.org/en/groups/using-credible-arguments-to-promote-opencourseware-concept-in-finland/tasks/

I see the tasks at the top of the page, but it took me some time to realize how to add a new task. The button is in the left navigation bar, and not very high.

Could you add a "new task button" next to the task at the top of the page?

I think the concept of P2PU is wonderful and the UI is ok, but there is some little things (like this I reported) which disturb the user experience.

In Wikipedia, if you compare different versions of pages, you can compare the versions to see, what has been changed. Now I can browse through versions, for example:
http://p2pu.org/en/groups/personal-learning-plan-do-it-together-university-the-independent-learner-in-community/content/the-presentation/history/

But I can not see what has changed. Of course I can open the versions in two different windows and compare them manually :-)

Message posted on the activity for a group (like the MoJo Learning Lab) wall don't respect Line Break, and don't make hyperlinks clickable (contrary to Comments).
It makes them hard to read, and less useful

The view-source URI scheme doesn't works in the text editor. (even when using "other" as a protocol, the href is simply discarded)

It's a standard and useful URI scheme, that can be used to point beginners and non-coder directly to the source of a web page (instead of giving them lengthy and browser specific instruction on how to view the source)
More info here: http://en.wikipedia.org/wiki/View-source_URI_scheme

When you open the Edit Learning Plan view, it is a little hard to find how to close it (from "view" link on the upper left corner). It would be a good practice to put a standard "cross button" to the upper right corner, to close the editor.

I think the buttons are in a little weird place. This image should clear my point:
https://twitter.com/#!/VesaLinjaaho/status/111528373901213696

Just signed up, was taken to page showing all previous signups interleaved with auto-replies from Jessica saying "Welcome aboard!" While it's nice to know I am, the auto-replies don't really add much to the page :-)