Well, did a bit more on the bike since Thursday.  Got over being annoyed and upset, pulled side panels and seat, and made one "oops" discovery and another, argh! discovery. 

First, the oops <blush> discovery:  I must take full responsibility for this, but when the tank was pulled for maintenance purposes, as is usual, the shutoff valve on the tank itself was closed.
[A little side note should be made here:  in my experience, that valve is in reality about as useless as wishing fuel flow to cut off.  Even with new gasket material, the darn thing at best reduces the flow a bit.  From now on, if I don't just drain the bloody tank, I'll set up a fluid level balance hose to prevent fuel flow everywhere.]

Curtis sent:  "Fuel filter or bad spark box"

So, after further procrastinating & dithering, I finally started getting under the skin to look at/into things.  Imagine my joy when I soon found

[for higher def http://goo.gl/1ZoXX ] - the Old and Nasty.  Oh goody.  Cross every appendage you can cross, Mikey-me-boy!

That was soon and easily replaced by

[ http://goo.gl/tYUnc ] - a new Wix 33011 filter. Ooooo, pretty and shiny, but knowing me, that's probably too easy. Of interest is that fuel level now stays at bottom, about where it is supposed to do.  Before, the whole filter was full.  Also note that it is nice clean gas.

 Keep in mind Slipfighter would still start and free rev, but lost power on highway. So I start him up, and he runs fine on center stand, but something still doesn't sound quite right, so I decide to check the cylinders empirically. {I did do temp checks using an IR no-contact thermometer, and could have sworn all four showed relatively comparable heat. But don't think it's possible - see following.}

However, anyway, yesterday my anal compulsive OCD reared it's ugly head, and I pulled the plugs to check them out and run a compression check.  First:  the great news!!!  All four cylinders are within a spread of 8 psi from 177+ to 185 and a smidge!

[ http://goo.gl/kYNO9 ] Oh crap, what's with #4, dammittohelandback!?!??   The electrodes look almost virgin new.  Argh!

So I have a couple of possibilities, as I see it, at least two of which require tank & fairing removal, again.

1.  Bad plug wire or plug wire connection connection  --  will first remove and re-seat plug boot and cross fingers.  No fix then on to;
2. Pull tank & fairing:  check connection at coil.  Run on "IV" test tank.  If not a fix, swap in new coil and test again;
3. Swap in alternative Dyna ignition module to eliminate spark box culpability;
4. All else fails, try an alternate spark box  (I have a few, somewhere, I think . . . , sigh . . . ,)

One thing I do not know, but doesn't seem possible -- there isn't any way a spark box can only fire one cylinder, is there?  Doesn't seem possible, considering 'wasted spark' ignition. For the same reason, it can't be the pulse generator(s).  The dam things fire every revolution of the crank, as I understand it.

Things will be on hold until 26th, after flying out to see Mike-2.