ahhhha! ;)
the problem fix is simple, using 2plugins and shortcodes ..
step 1.
install and activate plugin nr1
from here: http://www.sterling-adventures.co.uk/blog/2008/03/01/avatars-plugin/
and from here:
http://authoravatars.wordpress.com/
step 2.
in dashboard, go to users, avatars and give the blog user an avatar ( i used a img code from where i took the avatar, ex: facebook,) and hit update.
step 3.
create a new page if you have not created a "blogs/users" page,
use the following short code to get the avatars and the name of the user [authoravatars avatar_size=75 show_name=true] , size defining the size of the image.
step 4. publish page and you will see the avatars in line with the user name, if you press the avatar you will be directed to the user/author it belongs to :)
since the two plug ins work together , the global avatar plug in will make the chosen avatar global to your MU network.. in my case the avatar comes up when you comment on a post, when you post in the forum and since the author avatar is a widget ready plug in, i have 3 random blog users/authors listed in my sidebar :)
there is probably a better fix to get this done but i havent found it yet.
the global avatars plugin is supposed to give the author the opportunity to upload their own avatar from a hard drive, but have not tested that yet, you will find out how to do it in dashboard---->users---->avatars under " user uploads".
hope this will help others.. and if it is needed i can take screens of how to do it.