Sonofabitch. Flash 9 is on it’s way to Linux. Penguin.SWF suggests an early 2007 release, and a beta (real beta, ie, mostly working) before then.
I don’t code to Flash, as it’s both proprietary, and makes for bad (though pretty) site design IMO. But having a working viewer would make my life a lot easier. Many of the new flash video player widgets, for example, are leaving Linux behind (at Flash 7).