I found this article great in explaining not only how to use large menus but an arguement towards moving in this direction:
Summary:
Big, two-dimensional drop-down panels group navigation options to eliminate scrolling and use typography, icons, and tooltips to explain the user’s choices.
Mega Drop-Down Navigation Menus Work Well
Scott, we travel in the same “Circles” as in; FaceookB, G+, Scoop.it and NetworkedBlogs. I like your tagline “I help you look like a computer Genius Online”. It’s good to see I’ve embedded many/most of he same WP plug-ins that you have, so maybe I’m a Genius in the making. Cheers — Neil