After digging around the 'DotNetNuke' database, I could not find any tables under SQL Express 2005 that had anything do with DNN. I was about to delete one section of my forums and move forward and then stumbled across the HOST > SQL tool while logged in as the 'SuperUser' account.
The following two SQL queries fixed the broken post
Select * from Forum_Posts
Where UserID = 0
This displayed the single post that effectively broke the forum due to the timeout thingy I've been reading about. I went to the user account section of the portal and found the correct UserID to be '17' and used the following query to update the errant post. Additionally, I made note of the errant PostID, '137'.
Update Forum_Posts
Set UserID = 17
Where PostID = 137
All fixed!