+1  A: 

Yes. As you know, SVG files are vector images, so you can simply zoom in when you view it.

But if you want to change the default size, then you can replace

<svg 
   xmlns:dc="http://purl.org/dc/elements/1.1/"
   xmlns:cc="http://creativecommons.org/ns#"
   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns:svg="http://www.w3.org/2000/svg"
   xmlns="http://www.w3.org/2000/svg"
   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
   version="1.0"
   width="958.69"
   height="592.78998"
   id="svg2275"
   sodipodi:version="0.32"
   inkscape:version="0.46"
   sodipodi:docname="Map of USA with state names.svg"
   sodipodi:docbase="C:\temp\webdesign"
   inkscape:output_extension="org.inkscape.output.svg.inkscape"> 

with

<svg 
   xmlns:dc="http://purl.org/dc/elements/1.1/"
   xmlns:cc="http://creativecommons.org/ns#"
   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns:svg="http://www.w3.org/2000/svg"
   xmlns="http://www.w3.org/2000/svg"
   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
   version="1.0"
   width="1917.38"
   height="1185.57996"
   viewBox="0 0 958.69 592.78998"
   id="svg2275"
   sodipodi:version="0.32"
   inkscape:version="0.46"
   sodipodi:docname="Map of USA with state names.svg"
   sodipodi:docbase="C:\temp\webdesign"
   inkscape:output_extension="org.inkscape.output.svg.inkscape"> 

That is, you define the viewBox (to 0, 0, <oldWidth>, <oldHeight>), and then you can set the width and height as you wish. The above example thus doubles the width and height.

Andreas Rejbrand
As a sidenote, I would remove all unnecessary metadata (such as paths on my own system) from a SVG created by Inkscape before publishing it.
Andreas Rejbrand