I don't presume to speak for BenJeremy here, but I assume that IGR will NEVER make it into MXM, and it shouldn't.
Anything that needs to be running during gameplay should be implemented in the BIOS. Do a search for IGR in these forums and you'll notice alot more complaints about it screwing up games than anything else.
If you need IGR, and heck, we're all lazy, so we all want it, update your BIOS if possible.