Glass Pane

Glass Panes are a forthcoming block that was announced by Jeb in a tweet that may be released in 1.8. It appears to have the same placement behaviour as Doors yet connects like Fences and has the same texture as Glass. Jeb also stressed that it will not replace the actual Glass block. Jeb has confirmed that Glass Panes cannot currently be placed horizontally. Glass Panes can be mined and picked up without being broken. (about 1:45 in)

Crafting
Glass Panes can be crafted by placing 6 Glass blocks in a rectangle.