I just got back from Subaru City. I had the car in there for another TSB, and asked them if they could do this one while they were at it.
They had it done before 10am.
Apparently the TSB involves re-routing the tubes going to the PCV so that they are not directly in the path of the air coming down through the intercooler.
I don't have a pic of the routing beforehand, so if someone could take a pic, that might help.
Note, they do not replace the PCV, only the tubing that goes to it.
As the title of the thread says, it is only for wrx and 265, as the STI routes the tubing differently.
For those that want to OCD about the numbers and various things... I'm too lazy to scan this. But here's a pic.
Some various pics of the modification. Click to go to the flickr page to see full size.