The mod is still working on getting all the tags rounded up, but if you're interested, go over there an make an introductory post and list the places you've been and are willing to talk about. What restuarants would your characters go to in Chicago? Need a tourist's perspective on London for your protagonist's visit? Ever wonder how exactly how long it takes to go from Des Moines to Omaha and what you'd see on the way? (The answer is about five or six hours, and a lot of corn, soybeans, and cows.)
Use it to add versilmitude to your stories and your character's reactions. Provide color for original characters, or breathe life into your backgrounds. Make friends and influence people!