The NYTimes had a pretty interesting article on how consumers are using the power of the web to make their woes heard by big corporations with bad customer service.
After a Comcast repairman fell asleep, at a customer's house--on the job, the irate customer captured it on video and posted the incident on Snakes on a blog and on YouTube. Well, that did the trick. Comcast fired the technician and sent a "team" of experts to fix the problem.
This example only goes to show you how important blogs and vlogs have become in making our voices heard in this new web (2.0) space.