First things first:
2003 Silverado
BAK
V&H Longshots
Barons Tach

Here's the story
I ride everyday to and from work when in town.
I have been out of town for almost two months but came home twice in that period and rode a few times
the last stretch was 20 days.
On Sunday night I pulled the battery tender out and hooked it up to the bike since it hadn't been started in almost three weeks and I would be riding it Monday.
Monday morning I disconnected the tender backed the bike out and turned the key
Instrument panel lit up and went through it's deal but I didn't hear the fuel pump kick in.
Hit the starter switch and nothing
Toggled the kill switch and then I heard the pump kick in
Bike cranked right up and I drove to a gas station and filled the tank.
Bike started after that with no problems and I rode to work 35 miles away.
When I got near work and came to a light my tach was freakin out at idle. Like all over the place.
I have seen it do this once before when my battery was bad
Got to work, hit the kill switch
At about 530pm I got on the bike and turned the key and Nothing. Zippo, Zilch, nada
Popped the seat hooked up some jumpers to a car battery and still nothing
Turned on the car and nothing
No lights, no horn, no pump, it's like the I'm not even turning the key.
I also noticed that my fuel gauge is still sitting over at full.

Popped the side cover off and checked the ignition fuse and it's intact. Swapped it out anyway and still nothing.
Pulled the instrument panel off and the three connections (the two under the panel and the single two conductor lead at the tail of the tank) all are in good shape and clean.

Battery shows good voltage on a meter and it is less than a year old, leads look good and clean.

Currently have it loaded into a box truck for the ride home tonight and then have four days to play with it starting Thursday. I'll throw it up on the lift and start pulling things apart but I am at a loss.

Any ideas guys?