How do you use social media?

The term "social media" is subject to many different definitions and interpretations. To make it simple: for my purposes, if you're reading this blog, you're a user of social media. If you ever listen to podcasts, you use social media. If you're on Twitter, you're a social media user. But why do you use social media?

I'm running an informal Condorcet poll at http://is.gd/qKkz. Please click on the link and follow the instructions to rank your uses of social media (blogs, podcasts, and Twitter). I'm testing some theories, and I'll give you a tentative report next week.

Please repost links to this poll. Thanks!