You can add additional boxes to the weblog menu by using the "Expert: CSS" mode. If you use the Gazette template you have to do it slightly different:
Select
your weblog and choose the subsection "Expert:
HTML" from
the "Design" menu.
You will see the HTML source code with variables for each of the boxes or areas
in the menu (the things beginning and ending with two colons). If you add this
code between two variables, there will appear an additional box which is
formatted correctly:
In this example the box will appear between the archive and the calendar. You should replace the colour value"#000000" with the border colour of your weblog.