Hi,
Maybe it exists already, but I made a simple MATLAB script to convert a spreadsheet to tiddlers in .tid format (so one can just drag and drop them to a wiki). The top row in the spreadsheet should be field names, where one cell needs to contain "title" and another "text". If standard fields are not provided (created, type...), MATLAB will create and populate them. There is no filtering of field values, so I guess one might run into trubble if one is using exotic characters.
I know MATLAB is quite expensive, so maybe someone knows if similar tools (or maybe not-plugin scripts in general?) have been created in python or c++ etc?
Best,
Anders