Let the hive mind of Engadget get that for you.
"As someone who doesn't reside in the USA, I was wondering what would be the best way to get internet for my computer in the US for a couple of weeks? If it were Europe I know I'd look for some prepaid data. Is there anything similar offered by American carriers? A MiFi or a data SIM that I can tether from would work, but I'm trying to maintain a tight budget. Help!"
HDMI on a sound card is useless IMHO without the video going along with it. Dolby Digital and DTS will stream just fine over optical without wasting an HDMI port on my receiver.
When someone comes out with a new top end video card/sound card combo with HDMI (with CableCard support too please), I'll be the first one to jump on it.
According to the link, it sounds like it will capture video, which I would think is why it needs a pcie slot. I'm sure HDCP will smash our hopes and dreams to the ground though.