This is unbelievably cool:
But perhaps more interesting than that is the possibility of mixing SVG graphic elements directly into the markup of regular XHTML pages, freeing vector graphics from the small rectangle of a browser plugin and opening up a host of exciting new possibilities for web developers. This is enabled by the integration of SVG directly into the Gecko rendering engine, instead of as a browser plugin.
Combine this with Ajax techniques and you get asynchronous, interactive, data-driven web applications without the need for plugins or other proprietary technologies. Applets have been dead for a while, but this, considered in the context of Macromedia’s acquisition by Adobe, could also mark the beginning of the end for Flash’s dominance as far as dynamic graphical content is concerned.
Just think how fast, responsive and accurate Google Maps could be if it used vector SVG data instead of raster images. Think zooming in and out with almost infinite precision without reloading a full set of tiles.

Yes it is good to hear that Firefox is going to include SVG alhough Opera already has it included. Now all that is needed is IE to follow suit. I really want to see SVG become more prominent in the web.