I had two talks at each event, (apart from in Munich where we had an awesome local Chrome engineer give the talk - thanks Jochen). The first talk was a Chrome Extension talk shared with @Mahemoff and was about developing Chrome extensions.
The slides for the Chrome Extensions talk can be found here: http://gdd-2010.appspot.com/Extension.crx it all runs as a Chrome Extension, so you can quickly see the power of what can be achieved inside a Chrome extension by directly showing you the API's in action. It must be noted, that this extension needs to run in experimental mode, which in the latest dev channel can be enabled by visiting about://flags. I will put the code on Github soon.
The second talk at each event was about building great Web Apps. I really enjoyed this talk, because it is a logical extension to the pure HTML5 talks that present the technology, and I presented some ideas for building great experiences for your users and how you can use the latest HTML5 API's and CSS3 attributes.
The slides for the building great Web Apps can be found here: http://gdd-2010.appspot.com/WebStore/index.html again, I will put the code for these online soon so that everyone can see how we built them.
I met a lot of really enthusiastic developers over the course of the trip, most of which are building really great applications on the Web. I met developers building protein sequencers, automatic app builders, games and much more. It is amazing the amount of innovation that I saw directly from the developers that we don't get to see highlighted in the Tech Blogs. I did find that a lot of developers don't travel with Business cards, I would really like to reach out to you, but I can't if don't know your email address :)
I have also attached some awesome photos of my travels and the events, so I hope you enjoy them. Each of the cities were amazing, I managed to spend quite a bit of time in Prague and I loved the city.