If you want to make threads on your forum a valuable resource on a topic or come up with some ideas for an off topic thread, then consider adding the BB code to insert Wikipedia pages into a post (for vBulletin). It is used here to to add posts for a Today in History thread in the off topic forum and there is another example here, where a question was asked about an obscure topic or it can be used to provide more information on a current topic (eg swine flu); rather than link to Wikipedia for an answer, the Wikipedia page was inserted using the BB code. This keep people on your site and makes the thread a more valuable resource on the topic.
You may want to play with the sizes in the BB code to adjust what is displayed. Perhaps assign a moderator to add Wikipedia pages sparingly when a topic warrants it.
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