I implemented now support for OpenID for the forum module. That means that you can now register with your OpenID in that way you don't have to type in your name, e-mail address, nickname and so on (if you set up a persona).. everything will be pulled from your OpenID provider automatically.. you just need to allow the system to do so.
You can try this on [url=http://test.silverstripe.com/mlanthaler/]my test page[/url].
The code is in svn://svn.silverstripe.com/silverstripe/modules/forum/branches/gsoc - you should have access to it.
If you have no OpenID you can get one for free at [url=https://www.myopenid.com/signup]myopenid.com[/url]
Please let me know if you experience any problems.
> i'm aware of the fact that my login probably has to be "approved" as a valid cms-user
> somewhere, is there another way to register? :)
You have to register your OpenID before you can use it to log in. So please go to http://test.silverstripe.com/mlanthaler/ForumMemberProfile/registerwithopenid and register your OpenID. Afterwards you can log in using the normal login form.