According to the mu-mo page:
Regular shops that usually give bonus goods: B3 poster (online shops probably as well)
mu-mo shop buyers: B3 poster + Christmas card
TeamAyu mu-mo shop buyers: B3 poster + Christmas card + fleece blanket [CD+DVD purchases only for some reason]
How random... but they stuck the choruses she posted on her blog on the main website as an image file.
http://avexnet.or.jp/ayu/jp/news/091109.html
Kinda weird, lol. I'm beginning to think that the colors associated with this single will probably end up Memorial address-like.