A few observations and theories about peoples' powers:
First off: Hatian Guy. I think his power is only memory alteration, not power-blocking. In the scene where HG seems to be blocking Eden's powers, he's not. Eden's powers still worked, as evidenced by the funky voice-effect. He was using his powers on
Mr Bennett, not Eden, erasing his memory of Eden's hypnotic suggestion as soon as it was made. If he were a power-blocker, they would be setting him up for a more direct thematic confrontation with Peter and Sylar (the other power modifiers).
As for Sylar, I think he can definitely detect heroes. I don't think it necessarily has to be a conscious thing, either. We've seen him miss a hero right in front of his face on two occasion that I can think of (Hiro in the diner, and Claire in the locker room), but in both those cases there was a least one hero present. I think he can sense a "disruption in the pattern" that a Hero creates, but can't pinpoint exactly where it's coming from. He knows that there are "Hero Vibes" in the diner, and makes the assumption that they’re coming from Charlie (possibly recognizing her from Chandra's List?). Once Sylar absorbs her, I imagine he's a little disappointed to realize that he has a newfound proficiency for languages and trivia, and not the ability to bend space and time that he was hoping for. Oh well, some days it just sucks to be a brain-eating telekinetic power-ghoul, I s'pose.
The one I'm really interested in now is Mr Bennett. Who IS this guy? He doesn't seem to know about the Heroes specifically at the beginning, but he's not surprised when he gets the call from Dr Chandra asking to see Claire. Not happy, but not surprised, either. He's already into some funky conspiracy game at that point, but what is it? I want the details behind Claire's sketchy adoption. And is he really evil? Ruthless and Machiavellian, yes. He kidnaps, manipulates and lies, but does he believe that he's acting for the greater good? The impression at the beginning is that Bennett killed Mohinder's father…I'm guessing he didn't.
A little long-winded, but this show's best strength is in its' ability to generate just this kind of speculation, so I am unrepentant
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