I am generally happy to include your variant. Just a couple of questions:
1. Is this variant used by many people?
2. Could it be better described as "include fi(basic)" + smth? It seems it is
not completely different...

This is the new keyboard layout which should replace the old one. Kotoistus is a
project under the Finnish Ministry of Education, and was given the task of
designing the new layout. Microsoft had a repsentative in the design process,
and they will be including this layout in Vista. We used an approach of not
messing with any key positions on the current keyboard, which is why you will
see many similarities with the old one. 

I tried using an include, but it created a problem because we also have some
letters which should not produce anything. I don't see a problem in adding some
other letters in those positions, but I would prefer that those additions be
added as a separate definition, which would then be included after this one, so
users who want a keyboard layout which follows our settings strictly, are able
to select it. Those users who want some other letters in the empty positions can
then be given another layout option which includes this file and then the other
file (e.g a superset with copyright and cent symbols). 

Please note that users now have the compose key for producing rare letters. 

The Sami language has its own keyboard layout, which is specified in the symbol
file. That should be left alone. I don't know  the details behind the nodeadkeys
layout, so I cannot comment on that. (I am looking at the pc/fi file from the
Xorg 6.9.0 distribution.)

Thanks Troy, your explanation makes perfect sense to me... I'll commit your variant.

committed.