It just started working again, for some reason. I think I might have downloaded a different version of the mp4 player tools when I was trying to find a decent AMV coverter yesterday, maybe that's what did it? I don't know. But it's recognizing all 8gb again... no clue if it's actually 8 or not, but still.
I did notice that in BootIt, it shows up as a 1.8gb drive. Maybe the chip is a hacked 2gb? I guess i'll just have to copy a bunch of crap to it and see what ends up corrupted.
For anyone else that had this problem, I used mp4 player utilities or tools or whatever version 4.0