I should add also - keep in mind that Molehill is still pre-release and isn't available via standard "get flash player" download channels yet. Your client's required timing will play into their decision too. There is a "update curve" once the player is released, and your client may want to wait until more people have the player, etc. Lots of variables in the decision, to be sure.
If they want support for the current flash player, Away3D 3.6 can do the job, but it won't perform as well as Broomstick will. -Dave
