Just out of pure curiousity, what is your rationale for "wanting to get away" from Flash?
Besides the pricing for the authoring tool, it would be hard to beat the convienence of the Flash plug-in penetration world-wide or unless your one of those types when a company gets large enough you just treat them as if they were some kind of evil empire like the Microsoft scenario.
But, I will leave you with what I believe is the "only" true alternative to Flash from a webapp developers point of view which is of course SVG, check out www.kevlindev.com, he is co-author of SVG unleashed and has plenty of examples on how to code SVG and you don't have to buy anything to author, just use your notepad and your off and running.
Of course you will see some 'proprietary' versions of SVG coming down the pipeline from Microsoft in the near future, but wouldn't hold my breath until then.
Again, I can't imagine why you would want to look over probably the largest user, plugin, and support base on the net today. But I'm sure you have a logical reason for this, right? So, please elaborate on your post for everyone's sake.