HD-PVR Does Have Multi-Tuner Support
Hauppauge has confirmed via email that the HD-PVR will have multi-tuner support for all major software packages such as BeyondTV, SageTV, MythTV and Vista Media Center. 🙂
UPDATE – Just to clarify, "multi-tuner" in this case means you are free to purchase several HD-PVR’s and connect them via USB to the same PC. This does NOT mean that you will be able to record from more than one source at a time with only a single HD-PVR. Bottom line, if you want to record more than one show at a time, you will need to purchase a few HD-PVRs.