At its core, Bumped.in is a community for people on the move.
The ones who created it thought about the many people we cross paths with on a daily basis, and how they could actually enrich our lives if we actually interacted with them. Hence, this site was born. It will let us connect with that people and get to know them better.
The dynamics of the site are as follows. Upon signing up (or logging in via Facebook Connect) you will be able to add your itinerary, and create a digital travel log. Each travel log is named a “Bump Wall”, and this “Bump Wall” is where all your updates are going to be featured once you have set off. These can include photos and notes that will let others know more about you.
One of the big pluses of Bumped.in is that it lets you make public both your daily commutes and any voyage that you are to undertake; both train rides and flights can be detailed through the site. But the idea is the same in both cases: letting you find people that will make every step of the journey a more amenable one.
Bumped.in In Their Own Words
“Make the most of your trip or daily commute by connecting with the people en-route with you.”
Why Bumped.in It Might Be A Killer
People who are adventuresome will just love it – they will be able to spice up their travels in a way that was previously impossible.
Some Questions About Bumped.in
Can you keep your trips private or at least more restricted if you want? 
