In addition to the above fuzzy-matching idea, you could also do something similar to Wikipedia, and for redirected pages, included a notice at the top like: Re

In addition to the above fuzzy-matching idea, you could also do something similar to Wikipedia, and for redirected pages, included a notice at the top like: Redirected from catonmat.net/artikle ...to let the user know that they did not type in the most preferred URL, so hopefully they will correct their mistake in the future.