Help! Dashboard is a christmas tree! (2007 Sienna)

All of the sudden yesterday, everything on the instrument panel lit up. Well, I shouldn't say everything, that's the interesting part. It started with the Brake light. Then the ABS light came on. Then the maint. req'd light, then the check engine light, then the airbag light. This is all in less than about an hour. Also, it's locked out from going into drive. Like the system has determined that for my safety, it will not allow me to drive the van. The engine turns on just fine, and if you hold down the little button on the shifter bezel, you can put it into drive. And it seems to drive fine. Brakes work, couldn't really test ABS, so not sure about those. However, almost NOTHING electrical is working. The instrument panel is lit up, but the speedometer, temp gauge, and odometer don't work (the needles just aren't reading, it is all illuminated). Fuel gauge and tach seem to work fine. Radio doesn't work. Neither do power windows, power sliding doors, back hatch (it's release is electrical), brake lights, or turn signals.

Here is what is working: dome lights, headlights, hazard lights, aaand, that's about it. It drives fine (Although it does seem to shift into drive a little hard, but that could be normal and I'm just being paranoid)

I tried to have the codes pulled at Autozone, but they couldn't do that either! There was no power going to the ODB2 port. So at this moment, it's at the dealership, and hopefully they'll come back with a solid answer, but I'm hoping you auto-gods can give me an idea of what it could be. My bet is on the computer or something electrical, but I'm a back yard mechanic at BEST.

It's a 2007 Sienna LE with about 54K miles on it. Thanks in advance for your help.