Zatoo

I've just been Zattood, meaning that I can now watch real time local TV on my computer.

There is both an OSX client and a Linux client and some weird OS client for those who care too
I just tested it and it seems pretty fast an usable for someone who has an IP connection and sporacdially wants to watch TV.
However I couldn't care less .. I have cable and I never watch realtime TV anymore.

MythTV does that for me .. and I watch the shows weeks later :)