The eighth rugby world cup final will happen on October 23rd at Eden Park in Auckland. Initially sales went on sale via rugbyworldcup.com. Most fans are likely to wait to see if their team make the final, before trying to order last minute tickets.
It wasn't until the final stages of the 2007 tournament when demand shot up for final tickets, due to England suddenly finding form and becoming contenders. It helped that England were so close geographically to France, one would expect that if New Zealand and/or Australia get to the final for the 2011 tournament, the demand for a ticket to the final will be high again.