I've still got 11gig left on my 16gig MicroSD card in my Nexus one.
I can never be bothered to unload my pictures, and I have TV shows and Music on there for months that I have never even watched or listened to.
So I call BS on those that say they have to carry 32GB of music with them all the time. You don't listen to 32GB of music. You just carry it around as sort of a mine is bigger than yours sort of thing.
Still, I'd like to have a removable card.
Not for apps, because let's face it, install to MicroSD has not been a rip roaring success. Developers are slow to do it, only a few phones really need it, and that is because they were under-specd.
Maybe Google thinks this is not really necessary on a Dev phone, but it seems to be the easiest way to get new stuff into the phone fast. (OTOH, it has 802.11N, which is probably approaching the same effective speed as moving ROMs via MicroSD.)