I'm looking for a forum program to use as a forum/classifieds.
I like the freedom of a forum so users can write a little more then being restricted in a classifieds program.

Can this forum expire posts automatically? By a given number of days or the option of never expire, controled by the poster.

For example, if the poster wanted there message to be displayed for four days then it would automatically be deleted or taken off the board with a message sent to the poster for renewal.