A common and most probable replacement for trans fat style oils and shortenings is Palm oil, or Plam Kernel oil.
This is WORSE for you then most the trans fats it is replacing.... if its not fresh... like if used in a deep fryer, whcih heavily oxidizes the fat...
IF they institute this trans fat ban, we should make sure they ALSO BAN PALM oil.
The other killer in terms of oils to humans is coconut oil.
We learned about this 10 years ago in an advanced biochem class at the U of C.... I cannot beleive they are gonna just blindly "ban trans fats"...