If you´ve got an asset to show off, then sheer wouldn´t be a scandalous fashion. You don´t need to go as much as breast-baring pieces neither panty-showing dresses. Those as I believed are off. The number one rule in wearing sheer trend rightly is showing off an asset - knowing what to hide and what to reveal. Wear sheer to flatter and not to shock. Take these photos as an inspiration.
As far as fashion is concerned, sheer trend will still be seen in 2012.