I will assume their 2004 double-CD "Wellcome" was too experimental to catch much attention. I have the Stansted EP/DVD from 2005, contains a very cool rebuild of "Chew You To Bits" and some other good stuff!
Still surprised not many are noticing that they are back, perhaps due to the exclusive way they are releasing material now. They did open for Skinny Puppy in 2004 when they played London. In addition to that I think PorCon are going to be playing at Arkiva 2007 as well (-along with Front Line Assembly).
The new CD is extremely good!
MusicNonStop has samples. It is rather up front for Portion Control, apparently. Either way, it is extremely good and more people should know about it!