I went to Youtube to see if I could find out in what context it was used but I failed. I then searched the net using the exact phrase and found that several bloggers quoted the phrase to describe how they were amazed when they saw the way the page scrolled on the iPhone.
What 汉伦 provided is that he thought this phrase meant "You could reach me on the net", which is of course possible when without the context, but since Julia is asking about what "you had me at scrolling" meant when it was said at Steve Jobs' presentation on the iPhone, I think it's more important to pick out the most suitable interpretation for that particular occassion when there are more than one.
I know that 汉伦 has got a huge fan base, but isn't it not fair for the requester to get a less proper answer just because his fans are so ready to root for him without bothering to find out the truth? I really think a more suitable interpretation for "You had me at scrolling" would be "I instantly fell in love with it when I saw how it scrolled". You guys can by all means correct me if I'm wrong and I would be very grateful.
I don't mean to compete. I only said it at Julie's best interest. No offense, 汉伦.