Guys, I think I know what he was alluding to :D
The new issue of Comic Birz announced that there will be a Hetalia Artbook in February. Unfortunately, unless you're a buyer of Comic Birz and can afford to spend 3,990 yen to order it, you probably wouldn't be able to get it. It's a special-order thing. It's 96 pages long and has a lot of artwork, including previously-unreleased material (I wonder if some of it will be deleted sketches or if it's brand new stuff?)
It also comes with stickers, chibi cards, and a poster. I envy anyone that can get ahold of it.