hmmm...
Let me try and tackle this. <img src="/images/graemlins/smile.gif" alt="" />
First we have to decide what each of the positions of the cards will stand for, since
there are many three card spreads.
If we use "past, present, and future" we still have the issue of the nature of the question being asked -- material or spiritual, for example.
The central card would reflect what the querant is going through at present, and what his thoughts/emotions are in regards to the question.
The King of Pentacles is a card that deals well(if well dignified) with material matters. It's the fiery part of Earth, so some action/momentum is implied. This King is also hard working and clever especially in these material matters.
For me, it's hard to tell what this card would mean without the other cards present to establish the proper context. I'd think this would be a wonderful card to see (properly dignified) if you were asking a question about chances of success in a job, or real estate deal, or some such thing.
But, then again, what if your last card was a seven of disks/pentacles. It might mean an unprofitable venture...
But, I'm rambling. <img src="/images/graemlins/smile.gif" alt="" />
This was a wonderful exercise for me. I know this is a contest and all, but I'm curious as to what everyone else thinks.
Take care!