I remember when they first went up, but I totally forgot that they were still doing them, even when the show is on summer break, so check out the Heroes comic series at NBC's website here.
Meanwhile, NBC is also having a neat-sounding contest for wannabe comic artists, in their own version of the classic Marvel Try-Out Book. Here you will find a contest where you can draw a Heroes comic based on a three-page script given to you. The best artists will have their work shown at this year's San Diego Comic-Con. That is pretty darn cool. The contest ends July 18th.