Wikipedia provides a query api for accessing pages and links within pages: http://meta.wikimedia.org/wiki/Query Its very useful and I think people should use it if they want to scrape Wikipedia. At least it gives the Wikipedia guys a chance to throttle bandwidth if they need to.

You can download it here:

http://download.wikimedia.org

it's pretty easy to write a scraper in most languages and customize it as needed. I've done in PHP.