What is the ruling on using symbolic images of women, or men, or cartoon characters as a BlackBerry profile picture, knowing that all contacts are women and the pictures are not "indecent"?

To summarize the ruling concerning images, the scholarly disagreement about their permissibility applies when the image is not of something unlawful to look at. If it is, such as photographing private parts (awrat), then it is impermissible to photograph it. As for images of women, an additional concern arises regarding the possibility of non-mahram men viewing them. For this reason, it is preferable to delete them.