are you talking about mistyps? If you are then .com is the only way to go. Forget the other extensions if you are looking for typo traffic. The era we grew up with is .com With all the extensions our children will know them in the next say 20 or 30 years the .com wont be the common but reality is, most people in this generation are not familiar with other extensions. The future will be different but now is now. I have a hard enough time getting traffic from my .org/.net that are spelled correctly! But my .com gets 1000+ type ins on a good day just parking at sedo.