Very definitely - one option is to look at using SVG. You can get an SVG plug-in for IE or Netscape from Adobe. Plus there are other implementations of it also.
The spec and test suite for it are available from w3.
The SVG graphics can be readily embedded in HTML (by using embed or object). But if you're using the Adobe plug-in I wouldn't recommend having them inline at this moment.
I've already used it for doing interactive hierarchy charts and basic graphs.