The Alterac Brew-Pup's store page was briefly up today, but has since been taken down. This might be a sign that Blizzard is getting ready to release this puppy pet!
According to Wowhead, the pup's store page mentioned that 50% of the proceeds (between whenever the pet is released up until December 31, 2013) would be donated to the Make-A-Wish Foundation.
To add to this, MMO-Champion speculates that the Alterac Brew-Pup might be part of a Blizzard Store package deal. It was revealed during Blizzcon that the Fey Dragon mount would be part of an upcoming charity sale combo. While we can't be certain that the pet's sale is indeed the charity sale Blizzard was referring to, and that the mount will also be included in a related sale, it seems entirely possible.
Just to clarify: Neither the pet nor the mount are currently on sale yet. The release date has yet to be announced. But with all the recent activity revolving around the Alterac Brew-Pup, I wouldn't be surprised if it's released soon-ish. Perhaps for the holidays?
One thing that surprised me a little is that the charity set up for this pet is not the Red Cross or another organization that is helping out in the Philippines. Blizzard is known for supporting the Make-A-Wish Foundation, and that's awesome. However, considering the recent natural disaster, I thought that they might want to focus some goodwill towards those in immediate need.
Either way, kudos to Blizzard for being charitable. Pet sales are a great way to generate donations since who could say no to an adorable and loyal little follower? Not to mention that these digital items are giftable, so it's very easy to spread the love. I can't wait to see the Alterac Brew-Pup (and possibly the Fey Dragon mount) on sale in the Blizzard Store in the near future. :)