First quick impression:
NOT GOOD !!! WHAT are they doing, launching THIS !! a year later from their last release (860) ... IF I wanted 4 gb of storage, I would definitely go for pure memory, not for a mechanincal device. Also I think that a HD by itself, 16mhz more of speed (yes, I know, processor PXA270 should have some other improvements, I hope) and a circular thingy widgety to move the cursor (or whatever) is something like a bluff.
Sorry I am a bit mad, I can't believe sharp is getting something with so lame improvements on the market ... it just should cost them so much money to launch a new product, that they would better be still on the drawing design board, doing a better engineering work, with that money than give light to this gadget.
Anyway, dont take mee too seriously ... I will continue reading all press releases and stuff to see if there is any other surprise that balances things up for this 3000 zaurus