According to EzyDVD, Australia’s largest online DVD store, Seasons 8 and 9 will be released in Region 4 (Australia, New Zealand, etc) on March 8th, 2006. Season 7 was released in November 2005, and Season 6 was released in March 2005.
Although it seems odd that two seasons would be released on the same day, it certainly is possible. As usual, the release date is subject to change without notice.
Sources: EzyDVD: Season 8, EzyDVD: Season 9
(Thanks to Daniel.)
