I'd like to know what kind of activity was happening before and after the incident along the North Korean side of the border. If they are responsible wouldn't there have been some activity anticipating a response? A guy supposedly as paranoid as Kim certainly would've anticpated. The South is not the other side of the coin when it comes to the North. If Sung Yung Moon were from the North, he would be portrayed as the same but he's fortunate to be given the honor of being on the side of "good." I had read that during the Olympics opening ceremony, the Chinese were accused by insulted South Koreans of booing their team entering the stadium that all could hear on TV. Luckily I still had it on my DVR and went back to see and heard no booing at all when the South Koreans walked onto the field. Among other things I've read about South Korean politics and media, I wouldn't be surprised that this is made up or someone is exploiting an accident for political gain.
Yes I would suspect some sensationalism from the South Korean media. Headlines like "North Korean subs launch surprise attack on Cheonan" sounds a lot better than "Cheonan sank due to internal explosion". Does this remind anyone of the U.S.S. Maine incident which took place over a century before? We really shouldn't be making assumptions until the South Koreans fish out the second half of Cheonan.