I may be wrong, but if I recall, one of the new directions of breast implant research was toward a lighter material. The idea was that it would weigh something like 60% of current implants of the same volume. Somehow this would lead to fewer complications. Of course, the concept was especially exciting to us huge boob lovers, since it has the potential to lead to boobs of unprecedented size.
I will see if I can find the source again. But is anyone else familiar with this idea?