* The message count column is aligned to the right and will not wrap, so all new messages are easier to see at a glance.
* The link colors are also blue for unvisited and red for visited.
* The Last Visit date information is decreased in size and lightened.
* Some text on the right panel that is not a link will be recolored to black.

For IE users unable to make use of the buttons, click the Load as Plain CSS button and save all code to a file on your computer using the .css extension. Further instructions for adding a user stylesheet:
http://www.angehowe.com/delphi/UserStyleSheet.html

See screenshot here for comparison:
DelphiForums MyForums page

Find more discussion about this style at http://forums.delphiforums.com/clc_DPStyles/messages?msg=3195.1

*Updated 6/12/2010 to add a dark gray background to left and right edges.