Why isn't baseball and softball going to be continued after 2012?
The IOC voted it out in 2005, and reaffirmed the vote a year later. It was the first sport voted out by the Committee since they got rid of polo 70 years ago.
Unless it is replaced by another sport, there is a possibility that it can be reinstated for 2016. I'm not holding my breath though.
Baseball has been a medal sport since 1992 although it has appeared numerous times at the Olympics as an exhibition, including 1904 in Athens.
****Quick Trivia****
What are the only three nations to have qualifying baseball teams playing in every Olympic games since 1992?