Will Paizo be offering for sale Order of the Stick: Snips, Snails and Dragon Tales
No. Giant of the Playground is only printing that item to preorders, and it is only available through their website. They are not offering it to distribution.
We would *love* to have the book. But we are not allowed to get it.
More information here: http://www.giantitp.com/GIPOTSDr.html
Edit: That's the same link you provided. If you read the information on that page, he explains that it's not being sold anywhere else.