Aloha Jaben,
I was looking for the forum system which can accept anonymous post in DotNetNuke. Then I finally found YAF. This is much more sophisticated than DNN Forum module. But I want to use DisplayName instead of UserName. It is not problem for us that DisplayName is not unique, because we even accept Guest anonymous posting. So if you still have the modified yaf_dnn.dll, please PM or Email me.
Mahalo!