BuddyPress.org

sounds cool !

– I clearly do not want to change any CSS at the default-theme. I would like to have my page exactly look the same as at testbp.org .

– Only want to have the design of the “User-Blogs” being the same look & feel as at the default-theme.

– so in fact all “User-Blogs” should look the same, but each Blog-Admin should have the possibility to change the top-header-image (e.g. inserting his own Logo as the header-image) at his very own Blog.

Many thanks for your help Brajesh & Bowe !