Simply for the fact that it is becoming "notable" and "newsworthy." People who commit or attempt suicide are in a highly depressed and mentally instable state. They may feel "rewarded" for doing something "notable" and thus go ahead and do it.
Granted, the economy is probably far more responsible than anything else, but I think the media is a contributing factor.
What makes me think of it is this story about a young man who killed himself at a Watchmen screening:
http://www.kval.com/news/local/42527232.htmlWhat was he thinking other than "I will go out in a really epic, notable, way"? Most suicides are actually private matters, people want to kill themselves, alone, in privacy, some people even let others know what they did (such as putting a note on the door of the room that they killed themselves in as to potentially avoid people seeing a really bad mess).
These public, execution-style, mass murder, suicides, are quite ego driven, a result, I believe, of the media hilighting and making them somehow "more" than they are.