Lanny,

First of all, thank for your insight.  It is always appreciated.

I wonder about the way things are connected...  perhaps if I can articulate
this clearly you might be able to shed some more light on it...  In John's
case the sloshing sound from the dash certainly indicates that the a/c box
had water in it as you identified.  This makes me wonder how that might have
become filled... and if it can possibly be overfilled.  I mean if a large
amount water flooded the wiper plenum could that result in filling the a/c
box?  Is the a/c box caped or open on top.  If open then perhaps that just
spilled over into the passenger floor (and also what happened to me though I
thought it came from the window).  Also I hear that the heater hoses have
rubber seals around them where they penetrate the firewall and that these
fail over time (but can be fairly easily be replaced from the engine
compartment).  Could these be the source of John's leak?

Also, a separate issue is the path of water at the rear.  I have a wet
drivers seatbelt after significant rain.  I assumed that it was because of a
cracked funnel behind the drivers seat (which I discovered when replacing
the top and temporarily siliconed to death).  If the rain rail is working,
and no water is found in the trunk or the floor, then why is the seatbelt
getting wet? That is to ask, where is the water possibly coming from?  I see
a hole in the sheet metal below and in front of the plastic funnel behind
the seat and thought that the funnel must not be draining correctly and that
perhaps that hole leads to the seatbelt and perhaps on to the floor (and why
I had suggested it as a possible source of the problem to John)... but I
really don't know.

Thanks again for your help.