Maybe one of them will be succeed and that will be good for bitcoin. I encourage people to try them all out.
We are enthusiastic to see bitcoin be used by more people and see helping people close to each other trade in them as valuable. Avoiding having to send cash or a wiretransfer to someone far away is a good thing.
I know there are sites that identify people on the map who use bitcoin, but they expose the persons' personal information. Who knows if some government decides they don't want their citizens using bitcoin at sometime in the future. Do you really want to give them a way to easily lookup users' name and location?