I haven't actually "used" one to be able to recommend one. The menu on
http://www.publishermvps.com is code I don't interact with directly, it is
included, provided by, the open source web site engine I use for the site.
(www.dotnetnuke.com)
I myself in my own designs don't really like such menu's, I prefer a static
menu.

Another Publisher user recommended MenuMaker by Xara, and uses it to create
menus for a variety of sites. I am currently using it with Pub 2000, and
have been satisfied though a bit concerned that if JavaScript is turned off
on a browser, the menu will not show up. So, David Bartosik's preference for
a static menu should be considered.

You might peruse some of the free JavaScript sites for drop down
menus...there are lots of them. I did try a number of other JavaScript based
menus, but preferred the features offered through MenuMaker.

http://www.xara.com/products/menumaker/

DavidF