I was looking for a "sharing idea" comment, so it's great to see something is planned.
Being able to share a time-based, geo-based, or X-based slice (all or some of) with someone would be a great way to learn about "close encounters" before or after we met, or even someone else's perspective of a shared trip or experience.
Just a general comment; you've made something truly wonderful (IMHO), and I look forward to seeing where you take this.