With many applications already supporting SVG output such as Geoserver, Mapserver and Arcims(?), historically the low uptake of SVG in a GIS sense has been a result of users being required to download the plugin (current SVG use at 12%, in comparison to 97% for flash, or 94% for java [source]) .
With native SVG support coming for IE v7 and Firefox 1.5, you would expect SVG GIS usage to exponentially increase and maybe even become a defacto standard, at least for viewing simple vector data.
I must admit i have had limited use with SVG, but I can definately see this little niche becoming more mainstream. I will leave you with some interesting SVG links for anyone keen to have a look at its capabilities. Iâ€™d love to hear anyoneâ€™s thoughts for the future with SVG.
Interesting times ahead ..
Carto.net repository. Great info, recommended.
Directionsmag article on SVG GIS. Good introduction and background
Arcview / ArcMap -> SVG converter
AMRI GIS Some very good SVG utils and examples
Mapinfo TAB -> SVG Converter