Hey everyone, apparently you can use the OAuth of JOSM now, but it's only available for people who want to get into the JOSM-Settings...
First you got to click all the checkboxes under http://opengeofiction.net/user/REPLACETHISWITHYOURUSERNAME/oauth_clients/new, enter a any url and fill out the name field. You will get to a page where it says "Consumer Key" and "Consumer Secret", you got to copy these values into the correspondending fields in the JOSM-Settings. Authenticate and test, you should be done, it works for me.
Happy OAuthing
Martin
