Three of the most important features of the new (1) Twitter brand pages are the expanded header image area, (2) the inclusion of a "featured Tweet" and (3) the ability to separate out a brand's @replies and @mentions.
Dollar for dollar, you are actually going to receive more branding, and more impression impact, using streamed endorsements on Facebook and Twitter, than people seeing an ad on Facbeook, because the engagement rate is so much higher,
Customer experience matters. It matters for satisfaction and advocacy. Research found that organizations that have a well-understood definition of customer experience are twice as likely to beat their profit targets than those that do not.
Not all social programs are sustainable and it's best to undo / roll back a program when it is not in alignment with corp vision. Should Dell have launched the program at all? Probably not and that fact that they did was a misstep; how they handled it though is a case study for how to handle your own mistakes in social - believe me, you'll make a few.