Inkscape is nice. The above is a quick trace of a photo, because flexible image resolution adjustment was needed (and doesn't have anything to do with the Linux distro).

On the other hand, the original SVG (linked to if you click on the image) shows how little parity is there between freely available SVG implementations. Inkscape displays it correctly (obviously), librsvg does a rather nice job, but can't display masked objects at all (there is a slight gradient on the brim which is masked), and FF simply butchers the image, unable to display something as simple as a gradient correctly. 

As Ankh says, it's not good when the only widely-available, decent SVG viewer is Adobe plugin inside IE. 

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