i like the twitter one because you can just take a pic with your droid and press like 2 buttons and its up on twitter for who ever follows you to see. i also seen tweets from the plane that crashed in the hudson in nyc before it was even reported on cnn and fox news.
you can record video and upload it right to your twitter account also. or follow people that post crazy videos just need to search them out. people record all kinds of crazy stuff like people jumping from the golden gate bridge