From Amazon:
"Greetings from Amazon.com.
We are sorry to report that the release of the following
item has been cancelled:
"Buffy Vampire Slayer: Season 5"
Though we had expected to be able to send this item to you, we've
since found that it will not be released after all. Please accept
our sincerest apologies for the inconvenience we have caused you.
We have cancelled this item from your order."
/cry/
Eventually, it will be released... 8^)
Still a bummer though