here are a few examples of what i'm referring to for a navigation system done in flash:
http://www.1000dreams.com/portfolio/ now mind you, i understand its a full flash site, but looking at the navigation specifically its very simple and has a cool effect on hover.. nothing annoying yet cool.
http://www.logoyes.com/index2.html this is a good example.
http://www.broadcom.com and another.