If/when can users create icons to further personalize their Yahoo Toolbar in lieu of the standard icons?

I would like to use company logos as the icons in my Yahoo Toolbar. Cingular, Shell, DTV, Chevron, Dell, So Cal Gas, SCE & many others respond to the url by generating the company logo as the (icon). However, there are urls that aren’t recognized and I am forced to use the standard “canned” icons. I have created the icons not recognized by entering the url but as yet the Yahoo toolbar doesn’t accept or recognize them. Is there (hopefully) a plan in the future that will permit the user to personalize his/her own toolbar to reflect the icons of their choice? I use those icons as quick "identifiers" to link to sites I visit regularly. The option to quickly identify all sites would be grand!