Which three letters could you hear proudly proclaimed again and again throughout the sessions of Google I/O 2010? ...that’s right, A-P-I! Google APIs form the foundation of many of our developer products, and across the board, APIs made a significant impact at Google I/O.

This year, I/O saw the launch of a number of new APIs -- including the read-write Google Buzz API, the Google Font API, version two of the Google Feed API (with push!), the Google BigQuery API, the Google Latitude API, the Google Moderator API, and the Google Prediction API. Additionally, many of the sessions this year focused on how to better use existing Google APIs like the Google Analytics APIs and the YouTube APIs. And of course, we discussed many great topics during Office Hours and Fireside Chats, and after each session -- a big thank you to everyone who attended!

If you missed any of this excitement, today we’re pleased to announce that the following videos for the official Google API track are now available:

  • Bringing Google to your site - Google’s DeWitt Clinton and Jeff Scudder discuss a number of ways to integrate Google products with a site, including the Google Custom Search Engine, the Feed API with push, the Google Checkout Element, AdSense, Buzz Buttons, and more. DeWitt and Jeff also show how to “make the web beautiful” by announcing the new Google Font API.

  • Knowledge is (less) power: Exploring the Google PowerMeter API - Google’s Srikanth Rajagopalan and Rus Heywood discuss the concept behind, design of, and how to use the Google PowerMeter API.

  • Google Chart Tools: Google's new unified approach for creating dynamic charts on the web - Google’s Michael Fink and Amit Weinstein announce several new charts and features and expose the new look of the Google Chart Tools gallery. They also present the relative advantages of the Interactive Chart API (based on JavaScript) vs. the Image Charts API (based on server-side rendering), and show how they can work together to augment the users’ experience.

  • Google Analytics APIs: End to end - Google's Nick Mikhaelovski delivers an unprecedented sneak peak at how Google Analytics processes and calculates the data in reports. He also discusses the vision for Google Analytics integration tools and takes a look at how to integrate web analytics data with business data using the Google Analytics Platform.

  • Building real-time web apps with App Engine and the Feed API - Google’s Brett Bavar and Moishe Lettvin introduce two new tools to power the real-time web: the App Engine Channel API and the Feed API v2 with push updates. In a technical deep dive, they discuss how the Channel API pushes data from App Engine to a browser and how the new version of the Feed API subscribes to PubSubHubbub feeds and receive updates pushed to the browser.

  • YouTube API uploads: Tools, tips, and best practices - Google’s Jeffrey Posnick, Gareth McSorley, and Kuan Yong start off by discussing Android and iPhone upload best practices and how to resume interrupted uploads. They conclude by demonstrating the YouTube Direct embeddable iframe for soliciting uploads on existing web pages.

  • How Google builds APIs - Google’s Zach Maier and Mark Stahl discuss the foundations of Google’s API infrastructure, as well as a collection of different issues that shaped how APIs exist today. In addition, Google’s Yaniv Inbar demonstrates the new Java client library for Google APIs on Android, and Google’s Joey Schorr offers a sneak peak at Google’s internal API-building tool.

  • Analyzing and monetizing your Android & iPhone apps - Google’s Chrix Finne and Jim Kelm discuss how to build, launch, grow, monetize, and manage your Android app using AdSense for Mobile Apps. In a quick demo, Jim shows how to quicky implement Analytics in a mobile application.

We hope that you enjoy watching (or re-watching) these sessions as much as we enjoyed preparing and presenting them. Videos and slides for all of the individual presentations can be found on the pages linked above, but if you’d prefer to embark on an API-watching marathon, you should check out our YouTube playlist and watch away.

As always, it’s exciting to see the great and powerful products that you’re building with Google’s suite of APIs. We look forward to coding and innovating with you over the next year, and can’t wait to see you at I/O 2011!