As long as people want to use it.
Twitter was launched on July 15, 2006.
Twitter was launched in 2009.
No, it's very unlikely Twitter is going to cost money. What becomes a socializing site that costs money?
Mr.X did not want to kill one direction... They were rumors going around about it but she updated her twitter and said that "No I am not going to hurt the boys!" you can find out more by reading her journal entries on her tumblr (yes she announced she was a girl on twitter) realmrx.tumblr.com
Anywhere from half an hour to twenty-four hours. I think it depends on how much you tweeted.
By going to the ustream website at ustream.tv You can login using your Twitter details.
By going to the Twitter mobile site on your phone.
no
yes
yes
Of course not. Im going to when im 18 people. Follow me on twitter @The_MexicanKid .......
No