Racking my brains for title/author of short story or novella. There was some sort of teleportation device that would take you to varying locations on a post climate-change Earth(i think) and maybe through time too. One of the scenes featured the burning man festival and maybe an abandoned rocketship was another. I thought it was either a Dan Simmons or Charles Sheffield story or maybe I read it in Dozois' Year's Best SF but I can't track it down. Anybody help?