Yes, it has something to do with the USB-on-chip bootloader thing on the micro.
It might be my circuit, though, because my Uno still locks up before the setup function, although it isn't lost to the wind (So I can use serial monitor for debugging, which is nice)
More troubleshooting, yay!
EDIT:
Yeah, ignore everything I previously said. It was my circuit.
I thought I grabbed 12pF caps for the crystal on the ADC, but I guess I grabbed 12uF... It wasn't oscillating, hence the 'duinos locking up waiting for a reply from the chip or something.
I don't have any 12pF's, but I did find some 10pF, now it works fine.
EDIT EDIT: works fine... with the Uno. I still can't get it to work on the Micro, so I'm not exactly sure what's going on. I'm just going to stick with the uno now.
Sorry for the necro