Great catch Gargy! In response to the question, G4 is an actual cable channel! It is basically a gaming channel, but it is well known for showing various Star Trek episodes. The channel # is 354 for those of you using Direct TV. You could try TVguide.com or zap2it.com (I struck out on zap2it but I'm tired) to find out what channel it is for you.
I was able to catch the program from 2 AM - 4 AM. About 1 hour and 20 minutes into it, they came upon "Heroes". They showed a few glimpses, but nothing that revealed too much. They did, however, have a very brief interview with co-executive producer Jeph Loeb who did give away a tidbit of info...
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SPOILER!!!!!!!!!!!!!!
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/////SPOILER-Highlight below to read//////
Basically, no tights, no spandex. These are ordinary people. He went on to describe a scene in one of the upcoming episodes where 2 people were (flying flying?) from New York to Japan. One mentioned to another something about a cape, and the other replied that if the first person ever brought that topic up again, he was returning home.
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End of SPOILER!!!!!!!!!!!!!!
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Now, hopefully someone can confirm this. I had the volume low, I was tired, and as I write this I am even more so. Therefore, I may just be hallucinating.

I think I got it right though. Also, I think there is a chance that they will re-air that particular showing. (They kept stressing that we should tune in Monday, but 'till then they are showing the Comic-Con stuff. So is it new, or the same thing I watched? I dunno.
Some possibly helpful sites...
http://www.g4tv.com/
http://www.g4tv.com/comiccon2006/index.html
http://www.g4tv.com/schedule/index.html
http://www.g4tv.com/schedule/index.h...06%209:09%20AM
- The above post basically mentions the Comic Con 2006 Live show will be on around 9 AM and 4 PM on SUNDAY (Eastern time????)
http://www.g4tv.com/channel.aspx
- This one above should be the link for you to find your G4 channel
http://forums.g4tv.com/
(Edited: I caught the program again on Sunday, and it was the same as before. I was right, except for the it being L.A. instead of New York. Also,
tights were mentioned with capes, so the spoiler should include both. It really isn't much of a spoiler, but still being a bit cautious.)