Our message boards have generated some great content, and now I'd like to use some of it as articles for a related site. Where possible, I will ask permission from the poster, but many of these posts are over a year old and I'm sure I won't be able to contact the author of many of these posts.
If I can't contact the author, would it be wrong of me to use the post as an article?
Check your terms of service (if any) to see if they state who owns the content, what rights are reserved, etc.
I'm not a lawyer, but I'd guess in the absence of a specific statement that the copyright belongs to the author of the post. If that's the case, republishing the member's posts would be a problem (if you don't get permission).