I keep saying this - you have to follow up with the people you meet and magic will happen.
Pretty much every time I am on a stage I mention the weird "law of following up" - I can guarantee you that only around 10% of the people I (or someone else at the conference) meet will ever follow up. This stuns me - you meet someone interesting at a conference or in a social setting and you miss the one opportunity to turn a chance encounter into a lasting relationship.
Up to this day I don't have a good answer as to why this happens - the best I've come up with so far centers around the notion that people feel they don't necessarily have anything to say or contribute in a follow up conversation. That's BS! Here's the deal - even if you have nothing to say/contribute at this particular moment in time, just be nice and ask to stay in touch. That's the first step towards a relationship.
Today you are functioning in the context of your environment. You are your network. So better start building. And follow up for christ sake! :)