The latest WebKit nightly now has a decent amount of SVG+SMIL (animation) coverage. By my old school grading system, that gives WebKit a solid 'B' grade in terms of SVG support (75%). This is what I was talking about a few weeks ago and I'm quite happy to see it happen! If they cleaned up their regressions from a few weeks ago (some problems with SVG patterns, I believe), they might even crest 80%.