Random House the giant book publishers is actively engaging with social media networks and having some success.
I heard Ross (can't remember her surname - sorry) talking about their social media initiatives at today's e-consultancy social media event.
Random House has run campaigns with You Tube, Bebo, Second Life and Facebook. Sometimes helping to organise author pages with special discount offers on books and through more innovative competitions.
Louis Walsh of X Factor Fame has a book coming out and Random House is promoting it on You Tube by inviting people to send in videos of themselves singing. The winner will see theirs turned into a professional pop video.
Ross had some valuable tips on what the Random House social media marketing team had learned from engaging with the likes of Facebook etc:
One size does not fit all (ie all social media networks are different and you have to respect and understand the different environments)
Sometimes you can muck up (this is a new medium and we are in an experimental phase). If you put your commercial goods out there you cannot control how they will be received.
Be transparent and authentic (say who you are and what you are doing) in order to gain credibility
Plan resources and responses (it takes time to monitor social media campaigns and update them)
Go with the flow! Don't try and impose pre-conceived plans on social media network campaigns. They could always take a particular turn which you were not expecting which could turn to your advantage.
Think about the possible negative aspects of social media engagement and what you will allow.
It was really encouraging to see senior management at Random House are enabling the marketing team to experiment with all the different niche areas in social media.