Availalbe in the app store is an app we created called the Social Media Pocket Guide.
The Social Media Pocket Guide covers three of the bigger tools in the social media realm – Facebook, Twitter, and LinkedIn. Kind of like a best practices guide. Download the app at no charge here:http://itunes.apple.com/us/app/social-media-pocket-guide/id372724946?mt=8
There is also be an events category with social media and web conferences.