Fred Morrison has posted a "How to" Article on his blog about Creating a Discussion Thread in SharePoint/MOSS 2007 programmatically while overriding the default behavior/value of the "Author" field, I figured that I would post it, just incase anyone wants to do a similar thing on a portal project and are running into issues. As Fred points out, there are a few "interesting features" in how one needs to format some of the field entries. To be honest, I didn't know about this "issue", I mean "feature" until Fred pointed it out on his blog. It's a short read with easy to read code, so check it out if you need the knowledge of how to do this.

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If you have any questions about this or a similar issue, don't feel shy in asking Fred via his blog. I know him and he's always tried to be helpful to those who I have seen ask him questions.
~Robert Shelton