I personally don't like flash in websites unless a) its for a banner/header b) its for some sorta of game/video player etc or b) the website it for a graphic design company who wants to show off their skills
As for a Flash Menu builder, I am unsure. I'm only dabbled in flash a little bit and that was using Flash 8 Pro.
I heard search engines do not like flash menus as they cannot crawl them.
GS RichCopy 360 Enterprise - Voted #1 for data migration and replication in terms of performance and features. Replicate data across between servers in the same network, WAS, or even across the internet