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 my test page.
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 myopenid.com
Please let me know if you experience any problems.