There have been a number of times that a group project on Hubski has been awkward due to individual post authorship.
Today's update addresses this issue: Posts may now have multiple editors.
On the submit page, you can now see a small '+ editors' link. Clicking this link will reveal a 'cc' field where you can add the names of users that you would like to give editorial privileges to for that post.
You can add new editors, or remove them as you like. Editors may edit the text field of the post, not the others.
As always, feedback is much appreciated!