A craze that was started by Silicon Dust
years ago is very popular for a very good reason -- network tuners are incredibly flexible -- and it just came to any ATSC or clear QAM tuner. The company DVBLogic
has made it possible to turn any DVB tuner into a network tuner for some time, but since we don't DVB in the US, it hasn't been very useful on this side of the Atlantic. The latest release of DVBLink includes said ability which might be just the way for you to watch live HD on your laptop using the existing tuner in your HTPC. It isn't free software, but we're betting if you have the need the ~40 Euro price won't keep you from it -- assuming the free 30 day trial works as advertised.