Yes it is, but I have seen things about the specific IR encoding methods etc. maybe not working with a Consumer electronic device. I will play around this weekend and report back, unless someone has a definitive answer before that.
I havnt heard of problems like that, I think people have used the harmony remotes with the hauppauge receiver, so that makes me lean towards it should be fine
I use an OFA 8910 (cost $20) that I program from the pc with a JP1 cable I made. It controls the lot - tv, dvd, cable, mvp, amp... google for jp1 forums for more info.
Celeron D 2.53GHz, 1024MB
120GB, 160GB int, 80GB, 250GB ext, 40GB lan HDDs
PVR-150 retail, 1 wired MVP, 1 wireless MVP, OFA URC-8910 Remote Look for me on XBox Live!