its in the css, located in buddypress-home/css/base.css,
look for the logo class, its definately really easy to do, i have done it on my own site
Hi Steve:
This is how I did it:
As hyrxx above mentioned, go to: buddypress-home -> css -> base.css
Look for Header section in base.css. The fist part looks like this:
/*** HEADER **********/
#header {
padding: 25px 20px;
}
#header h1 {
width: 214px;
height: 29px;
overflow: hidden;
text-indent: -999px;
background: url(../images/logo.png) top left no-repeat;
float: left;
Just change the width and height to what your logo size is. You need to do the same on base.css in your member themes as well. I had to go into file management on my server to edit this, due to MU not having a theme editor option.