Miljan from ComponentArt announces the 2008 release of their charting engine. It's a really interesting engine for Ajax developers because it has a full client-side object model. Check it out.
Expensive indeed. There are quite a few free ones out there.
@joe: ask skhan. I don't know of any free ones that would compare to that but I'd gladly point to them from this blog.
@skhan : Tell me more about the free ones. I am interested in at least one.