There are many ways WordPress can integrate into social media services and networks, and many ways you can integrate those same services and networks into your WordPress site.
You can also integrate Google Maps, Google Docs, Flickr, Tumblr, and a lot of other goodies into WordPress.
There are many WordPress Plugins that make the job easier, but this article is focused on how to do it manually both for the self-hosted version of WordPress as well as WordPress.com.
WordPress.com Integration
- Your WordPress Is In My Facebook — Blog — WordPress.com
- Facebook Integration — Support — WordPress.com
- Publicizing your blog posts
- Sharing — Support — WordPress.com
Self-Hosted WordPress Integration
- Integrate WordPress Into Any Website Using Twenty Ten Theme 2011
- Integrating WordPress with Your Website – WordPress Codex
- How To Have An Integrated WordPress blog
Multiple Social Media Networks and Services
- How to (fully) integrate WordPress with Facebook – Webdistortion
- HOW TO: Integrate Facebook With Your Blog
- Import your WordPress blog into Facebook – WordPress.tv
- Facebook Like Button and WordPress Integration – Marketing Technology Blog
- Integrating WordPress with Twitter | bmharwani.com
- Twitter Marketing Tips: Integrating Twitter With WordPress For Maximum Online Marketing Exposure
Google+, Google Apps, Google Maps, etc.
- Google Chart Tools – Google Code
- Google Libraries API – Developer’s Guide – Google Libraries API – Google Code
- Using Google’s URL Shortener (goo.gl) in WordPress – Konstantin Kovshenin
- HOW TO: Integrate Google+ into Your WordPress Site
- Easy Graphs with Google Chart Tools – Nettuts+
- A Guide to Google Font API
- How to integrate Google+ into your WordPress plugin – BMo-design Demos
- 5 Google Plus and Google +1 WordPress Plugins Worth Checking Out – Theme.fm
- How To: Publish Your Blog Posts to Twitter with Google Feedburner — In Real Time – Theme.fm
- Using Google Reader “Send To” with WordPress – thingelstad.com
- Integrate Google Plus with Your WordPress Website – Some Easy Tips
- Google Custom Search – Site search and more
- Google Web Fonts
- Google Plus Integration with Other Networks and WordPress
- How to display your latest Google+ update on your WordPress blog – WPRecipes
- Using the Google Analytics API in WordPress
Tumblr, Magneto, bbPress, etc.
- bbPress – Integration with WordPress
- HootSuite blog – Social Media Dashboard – How to use WordPress with HootSuite
- Ecommerce Integration In WordPress and Tools for It – Blog@PixelCrayons™
- New and improved Typekit integration with WordPress.com – The Typekit Blog
- How to Integrate Reddit Into WordPress – Blogging, WordPress, Social Media, Web Publishing – WordCast
- 7 Ways to Link WordPress and Tumblr Blogs
- Addthis Integration for WordPress & Tumblr
- HOWTO: Integrate Tumblr with WordPress – Lisa Brewster
- WordPress System Integration 101 – Tips and Tricks
- 8 Ways To Integrate Foursquare Into WordPress – WordPress Jedi
- How to Integrate WordPress and bbPress – WordPress Mods
- WordPress Integration with Magento Commerce
Learning from Lorelle 
Pingback: Week 3: WordPress and blogging as a platform | Clark College JOUR 111 Class Blog