you're asking if u're a valued staff member or a redundant one
rite?
i'd hope for ur sake, and for ur efforts, that u are a valued staff
member. however in ANY good company, no one should be
indispensible. EVERYONE (staff, not directors etc) can be replaced.
of course that's just the theory, and from the company's point of
view that's wat it should be.
maybe in ur case, (hopefully not) mgmt might be taking u for
granted becos they see no problems and think that u're not doing ur
job. if they really are that "blind" and release u, they will start
running into problems since u're not there. however as far as u're
concerned, that's already too late.
so i guess now is to make urself more "visible" and try to make
sure ur work gets noticed. of course there are tonnes of ways to do
this, but i'm sure u u will work out the best way without coming
across as someone who's boastful or even carrying balls.
good luck with it! no luck can always try my popcorns! 
