This and many other personal options are available in your User CP located on the far hand left side of the page near the top.
Avatars, Signature lines, email and password changes and much more. Please check it out.
Here are some shortcuts:
Change password & email -
http://www.eccie.net/profile.php?do=editpassword
Change avatar -
http://www.eccie.net/profile.php?do=editavatar
Change signature -
http://www.eccie.net/profile.php?do=editsignature
Edit details such as location, hobbies, occupation, text under avatar -
http://www.eccie.net/profile.php?do=editsignature
Enjoy