Once you register with Dopplr and give your travel plan, it gives you all information about the places you visit. It also suggests friends who will be of help to you. I give below the mail I received from them:

Hello Benjamin Ross.

On October 9th you are travelling to Tiruchchirappalli . Before you depart, why not take a look at our page about Tiruchchirappalli , where you’ll find places that have been recommended by other Dopplr travellers.

Smart places to eat in Tiruchchirappalli

This is Dopplr’s Social Atlas in action. Travellers find outstanding hotels, delightful cafes, and interesting things to see, and share them with the wider Dopplr community.

The more people you share trips with on Dopplr, the more useful it will be for you.

If you're already connected to people on other web sites like Facebook, XING, LinkedIn, Flickr, Twitter, Windows Live Hotmail or Yahoo! Mail, we can search through your connections there and find those people on Dopplr , if they've already joined.

Or, you can upload your Outlook contacts.

And of course, you have your own Dopplr invitations that you can send to anyone you know . You can send as many invitations as you like!

Based on the fellow travellers you've shared with so far, we think you might know these people:

Remember, the more fellow travellers you know on Dopplr, the better your travel experiences will be.

Happy travels!

The Dopplr Team

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