I just noticed with 2.0 I don't have much space left on my 16GB PB.
Went digging around and it looks like the "Misc" folder in root holds all the android stuff and it seems to be duplicating everything stored on the PB.
if you do ls -al you'll see that they are symlinks to eachother
You won't see this if you look from Windows (in wifi share) because Windows doesn't know what symlinks are.
It's all good
And because of that, if you copy the misc folder, Windows will actually copy EVERYTHING the simlinks link to. Imagine my surprise when a backup that was supposed to be about 400MB turned into a 9GB one!