2) IMHO, you are a looser.
3) IMHO, this is the best answer.
4) Freedom of speech is Speaking IMHO
A rephrasing of imo.
Used in net-speak (read: retarded), it's mainly used to attempt to show that the opinion stated was either godly, true, or was stated by someone with humility. All three of those reasons are what would be simply known as bullshit.
Jesus: imho, ur goin to hell lol.