So, here is my very early yaml+phpwcms Test.
After looking around in YAMLS css files, I found a way to get also complicated css parts within YAML. Knutis NAV_LIST_UL Example from yesterday was a pretty good testing Version.
So what you see is only technical, without any design issue!
By klicking on any menu item you leave the testing area.
After this I wonder what else should happen to be called "non integrated".
Step by step I will put a small "howto" on this site.
Have a look : http://jgbm.de/test.phtml
UPDATE: NAV_LIST_UL playing together with YAML CSS Now 3 Menus on site, the Navigation in the head section is also phpwcms driven! (HCSS)