Attack of the dissatisfied customer blog
Francois Gossieaux had some trouble with his Mercedes E320 recently, but he really has a problem with the blame the customer response he got from Mercedes and the dealer (note the follow-ups at the end of the post). If English isn't your first language, the story is available on a French blog, too.
B.L. Ochman went public with her dissatisfaction in "My Bag is Lost and I'm Stuck in American Airlines Customer Service Hell." She got her bag back, but the blog describes in detail her unhappy experience with the process.
Jeff Jarvis made headlines with his Dell Hell posts last year. Now it seems that bloggers are consciously using their blogs early and often to escalate their complaints.