It's quite late in the month, but then it's better late than never. According to Kotobukiya's own online shop, the Roll model kit (happy HP? :p) is officially on sale as of now, December 27th. Though I've yet to see anything show up in my e-mail, you can probably expect notices of shipment any time now if you preordered. Even then, it sounds like a handful of orders shipped a little early.
And don't forget, Blues is out next month!
Edit: My order shipped!
News Credit: Ucchy-san