There have been several posts asking about a header menu.  I put one together and have all of the files and some screen shots available for download.  However, I just realized there is no attachment feature on this message board.

From joebloe at the nopCommerce forums.

http://www.nopeasy.com/contributions/categoryMenu.zip

Original post here:

http://www.nopcommerce.com/boards/t/5033/category-header-menu-is-available.aspx

Post questions about the code there.