Refdb allows you to store values in a three level hash-table like structure
of flat files. The resulting data is friendly to branching and merging
which can allow parallel editing of the spreadsheet.
Only gnumeric is supported right now and the sheets must have unique row
and column labels.
I realize I already put down my vote, but I'd like to promote my case after
some thought. I guess what we're trying to find out is what's more
troublesome and/or surprising:
1. having to set the port explicitly (to #f?) when you want to change the
scheme and its port
2. having to set the port
