We're working in the redesign of our web game Striker Manager. ( http://www.strikermanager.com )
We've done several poroosals but none seems to be convincing enough.
The problem is, we have a tree level menu that has to be visible most of the time because user navigate a lot between different sections, so we don't want complex animations, nor dropdown menus. Just a single click to navigate in the current section sibblings.
Sorry I forgot to post some screenshots to explain better my question.
In this image you can see the current design with the 3 levels I mentioned before. It has a tabbed main menu with four options in the left column that lead to a 6 option submenu, and that points to a page that may have a top menu.
A agree with avoiding dropdowns here... they would be too long.
Looking at the image, it seems the top right horiz menu would be level 2, and the box underneath level 3... because as a user I would expect that if I click on something on that top menu, it will show me the subchildren who belong under that topic in the box below.
If you have an account on github you should check out how they manage multiple levels... they do something very similar, since there are many ways to navigate to (potentially) lots of info. And when I'm on my page, there's a "second level menu" with choices like code, network, etc. if I click on code I see the folders of the repo I'm in in the box below (choosing a repo would be level one). If I click network I see the branches of the repos below. Etc.