Try something like this in additional.css (you may need to tweek it for your site):
HTML Code:
#sidebar_container.member_summary {
clear: left;
float: right;}
#userprof_content_container {
float: none;
margin-right: 260px;
margin-left: 0;
}
Use CSS to change the looks of the blocks. I'd suggest using firebug to help out with this.
Postbit looks can also be changed via CSS.