According to the official twitter, the Blu-ray and the DVD of Sora no Otoshimono: Tokeijikake no Angeloid
was announced to be released on February 24th 2012. The limited edition will carry a 1.4meter x 2.1meter bed sheets of Ikaros and Hiyori, and a life-size sticker of Nymph's fundoshi
Picture of Nymph's fundoshi (Nymph-ndoshi) in the anime
Kadokawa stated that they don't take responsibility for any injury caused by the usage of the Nymph-ndoshi sticker on a human body.
Source: Soraoto official twitter