According to this link, Wilma at 894 mb, has the 3rd lowest pressure on record.
http://www.hurricaneville.com/all_time_storms.php
Wilma was down to 882mb this morning, making her the lowest pressure on record for the Atlantic basin.
I've often congectured that we will one day be hit by a storm that has not yet been on the books....who knows.
That link is now outdated. Wilma ranks #1 with 882 mb earlier today.