With all the different features in this personal entertainment device, it is geared most towards the photographer. Here is a quick rundown of the photo options.

Download photos from memory cards
The following cards are supported:
Compact FlashTM Card type I/type II (CF)
Smart Media TM Card (SM)
Memory Stick® (MS)
Secure Digital Card (SD)
MultiMedia Card (MMC)
IBM ®MicroDrive
Mini-SD (with adapter)
RS-MMC (with adapter)
MS Duo (with adapter),
MS Pro Duo (with adapter).

Download Speeds:
From a sandisk ultra II 1gb CF to the vp8350: 3 minutes and 20 seconds

Downloads per Single Battery Charge:
Their website states 40, I downloaded 10 in a row using up ~1/4 of the battery then gave up so I think their numbers seem reasonable. BTW, since it has a 20gb hard drive I guess the exact number is kinda moot.

When downloading a card you have 2 options, full backup (whole enchilada, directories and all) and photo backup (downloads just the photos but also changes the file name)

Photo Viewer
The vp8350 supports the following file types:
JPEG: Baseline YUV
TIFF: 1 and 8 bits grayscale, 8 bits indexed-color, 8 and 16 bits true color
BMP: Monochrome, 8 bits indexed-color, RGB, RLE8
RAW: Support following camera models
Canon: 1Ds Mark-II, 1Ds, 1D-II, 1D, 5D, 20D, 10D, 300D(Digital
Rebel, Kiss Digital), Digital Rebel XT, D30, Power Shot
Nikon: D100, D70, D50, D1X, D2X, D1H, D1
Kodak: DSC Pro SLR/c, DSC Pro SLR/n, DSC Pro 14n
Fujifilm: FinePix S2Pro, FinePix S3Pro
Olympus: E-1, E-500
Minolta: A1, A2, A200, DYNAX D7, MAXXUM 5D, MAXXUM 7D
Pentax: istD, istDL, istDS

I have a Canon Digital Rebel XT (350D) shooting raw and have had no problem viewing my pictures.

Thumbnail Screen

To go from thumbnail screen to full size single picture screen usually takes less than 1/2 of a second (it displays the load time)

EXIF Data:

EXIF data can be easily toggled on or off.

Zoom Feature:

I like the zoom feature a lot. You simply turn the scroll wheel to zoom in and move the joystick to pan around the picture. The above is a full zoom of my son's face from the image shown just above. Note: you do have to zoom all the way out before you can move on to the next picture (because they both use the joystick for navigation). Note to note: instead of having to zoom all the way out before moving to the next picture, you can simply press the esc button and it quickly takes you back to the original size (Thanks for the tip, David!)

It is worth noting that there is very little to no lag time from thumbnail to full size pic, from pic to pic, and during zooming- nice.

Vosonic vp8350

If you have any questions for me, please send an email and I'll see what I can do.
You can also visit the vp8350 page on Vosonic's website.
dpreview's storage and media forum is also a great place to learn more about this and many other personal storage devices (PSD).
Disclaimer: I have no affiliation with Vosonic, just a satisfied customer who found very little info posted about this product when I bought it and figured this site might help someone in their search for a PSD.