Go either way and tell of your experience if you have authorisation.
We'd all love to hear what's going on now.

What happens is that anyone entering Cuba recieves an automatic fine of
10,000 regardless of the reason ( I know this first hand). You will
recieve the fine around 8 months after returning.

It happens now as a matter of routine and the treasury department has 3
times the treasury agents assigned to prosecute offenders as they have
assigned to track down the funding of asama bin laden and sadam hussein
combined (associated press article last year).

You will have to prove your validity in writing at that point. You
can request a court case, but from what I've heard they are so backed
up that no one gets it.

If you do it via boat, the coast guard has been given full
authorisation for seizing any boat under any flag via a presidential
order last year. But if you have authorisation, you should be able to
show it when they board and search you.

Good luck,

Doug