I'm not sure I've seen a site handle a sale so strangely. They've now reposted the sale under the title "June Blowout '09," but with the first sentence "Unfortunately, this sale had to be discontinued on Friday, June 12. The titles are still listed below at their regular price." Which they are, though most still drop to $5.98 if added to cart. I wonder what the motivation was to repost a sale days after being removed, just to announce it's over, but not correct the pricing.
EDIT: Well, I just gave them a call. All my four orders are ready to 'pick & ship.' I couldn't get a definitive answer if all orders out there are going through, but it doesn't sound like they are planning on canceling many/any.
Which of course brings up the question of what happens if you order today? You may still have a shot.