Yeah, I was more talking about the forum setup where each thread has a wiki as the second post that any registered member can edit. It just eliminates cross-linking with a different site. For example, I visit slickdeals.net a lot and they do it there. See the example below:
As you can see, the second post is a inclusive wiki that contains the important information that has been contributed throughout the thread.
Regardless, its a great idea and I hope it takes off in an organized manner where people can take advantage of others' generosity.