I don't suspect mirroring in this version of the ROM. I have no idea if it will ever. From what I can gather, the HDMwIn people don't appear very interested into working on the app to work with ICS. Athough, since it's open source, the code is there for someone else to tweak; I lack such skills.
Weird, I try DLing PB9 form my PC, but got the invalid key error in Chrome; this was for PB9, 8, and 7. Yet, I could get it from Firefox. I can't ever get it down load from my phone.