ssconvert lands in CVS.
People have been asking for cmdline access to gnumeric's importers and exporters for years. I've always resisted writing it because it seemed like such a perfect starter project for someone. After receiving three requests in one day I broke down and knocked off a quick wrapper.
150 lines of code, with attribution and fancy white space for the exporter list.
To be honest it did take a bit of tweaking to force it to work without a DISPLAY, and there are definitely lots of bells and whistles to be added. However, if you need to convert to or from xls it'll get the job done.
xls -> html
xls -> latex
OO -> ... well you get the idea
Now we need to add support for command line flags to configure the importers and exports.