[You don't mention the OS - so I assume Windows] I am risking an answer even though I don't use Windows and can't help with the specific issues to create the batch files (aka *.bat files). In general you can use the command line interface of Inkscape to export multiple SVG drawings to PNG or other formats. Maybe as first hint this section of the Inkscape FAQ could be helpful:
I'm on Windows, and command line parameters don't seem to work! and then the
inkscape man page (see also menu 'Help > Command Line Options')
Here are further links I had collected regarding the command line usage on Windows (though they mainly seem to deal with the debugging process - access to inkscape cl output doesn't seem easy ;-):
How to Use Inkscape's Command Line Options on Win32 | kaioa.com:
<
http://kaioa.com/node/42>
How to Use Inkscape's Command Line Options on Win32 - Part 2 | kaioa.com:
<
http://kaioa.com/node/43>
inkscapec.exe - A Command Line Wrapper for Win32 | kaioa.com:
<
http://kaioa.com/node/63>
inkscape-devel mailing list: include inkscapec.exe ?
<
http://thread.gmane.org/gmane.comp.graphics.inkscape.devel/30268>
I don't know if there is a (cross-platform) GUI app for Inkscape batch export.
[edit]
maybe the proposal of CarlCravens in this
comment could be used for batch export from Inkscape as well?
The Wizard's Apprentice ...
http://wizapp.sourceforge.net/It lets you write batch (or Perl, Python, etc) scripts using GUI dialogs ... not just a launcher at the beginning, but you can take input from a dialog, do some processing, and then pop up another dialog for more input or to show results. Once I get a chance to learn how it works, it should be pretty simple to write a GUI front-end to scour (and, say, uniconvertor) to make them easier for Windows users to deal with. (Heck, one could even write a front-end to a collection of front-ends for these little SVG utilities.)
[/edit]