The slides from Matt Biddulph’s developer talk about Dopplr and smart integration with the rest of the web are now available on Slideshare:

This talk was given at Future Of Web Apps 2007.

It’s a bit rough around the edges, but our new API is now ready for intrepid hackers to play with. Via the API you can do nearly anything you can do via the website: add trips, find cities and query information from your network of fellow travellers.

For authentication we use a similar system to Google’s AuthSub - so similar that some Dopplr API implementations are based on existing Google wrappers. We’ve contributed a Ruby wrapper, and developer friends like Simon Wistow (who had early access) have contributed Perl and PHP versions. Data comes in XML and JSON flavours, and documentation is a work-in-progress on the Dopplr Developer Wiki. Feel free to add notes to the wiki, or link to your own projects. Send us plenty of feedback and we’ll help you get your apps on the road.