Torben,
I can certainly see value in having a module that provides 'spreadsheet like' facilities, however I don't think that it is appropriate here. In my opinion any attribute and/or object management system should behave like a database rather than a spreadsheet (i.e. I personally would oppose the use of cartesian co-ordinates for accessing information).
Nevertheless aspects of your nomenclature could be employed in the tcl API and if a spreadsheet like module was to be developed it would be much easier to build it on top of the services that we are trying to specify here.
R.
