I highly doubt ZIP drive will be supported. The main purpose of the USB port is a smat media card reader connection to a computer (as many digital cameras and other devices use).
Also, I heard people say WAV isnt supported, but it mentions it right in the compatability list. I didn't think they even made sampelrs that don't support WAV files anymore as it is the standard.
I had also hear people say that file naming isn't possible. I HIGHLY doubt this as this is pretty easy to implement, and how would you distinguish different files. Also, if you check a bigger version of the picture, there are clearly letters to the left of each trigger:
http://news.harmony-central.com/Newp/2003/MPC1000-lg.jpg
I've always wanted a second MPC so that I can use them as turntables to mix together, but never wanted to drop money on 2 of the same thing, so I'll prob def get this as it seems to be up to par and even better than the 2000. Real time filters, built in FX, 4 out plus digital standard, large storage capacity... It costs a couple hundred to get a 2000 to have half those features and it still wont have some of them.