I finally got my new DS-565 (E3S) today. Not as nice as my E2N (which is like brand new), but still in very good shape. Paid $235 on eBay.
A few first impressions:
Battery wasn't charged (as expected), so I got my EH-1 Nikon charger only to find out that the plug doesn't fit!
For some reason Nikon/Fujifilm changed the charger plug for this newer model - probably because the E3 uses a Ni-MH battery instead of the older Ni-Cd version. Right?
Instead of the jack plug on the EH-1 charger, this battery requires a proprietary (?) 4 pin plug. New camera, no battery. Very, very frustrating (especially since there are not too many E3 chargers around anymore).
Idea: Perhaps I could use the Nikon AC adapter instead? Got my ES-1 AC adapter when I suddenly realized I could simply use the battery from my E2N. And so I did. It works!
For future reference, the E2N uses a Nikon EN-1 battery (7.2V 1200mAh Ni-Cd) while the DS-565 uses a Fujifilm BP-D56 battery (7.2V 1150mAh Ni-MH). Physically, both batteries are identical, except for the charger plug.
Camera ergonomics has been improved (or at least changed) from the older E2 design, but at first glance both cameras looks more or less identical. The DS-565 includes an additional SCSI connection on the back (covered by a very robust rubber cover which is secured by two screws), and a CSM and BKT button. The DS-565/E3 also includes GPS support (a first?) and other improvements.
As usual, the camera has a very low serial number: 8300032. All E-models I've seen so far have these xx000xx serial numbers, except for one: E2N no. 7100103.
Put in my one and only 40 MB ATA PCMCIA flash card and fired away. This camera is definitely much faster than my E2N: It can shoot an amazing 3 fps for up to 12 frames!
So far I've only shot a few frames around the house, so I can't really comment on image quality yet. I have a feeling that it may be a tad better than the older E2N, but I don't think there's a huge difference.
The fastest aperture is now f/4.8, compared to f/6.7 (?) on the E2N.
For more details, download Fujifilm's own DS-560/565 brochure
(507 KB PDF document).