From: Kansas, USA
Video: US NTSC / Sony 8MM CCD-TR916 / MovieBox USB / Sony DCR-TRV70 MiniDV
S9 PC: Centrino Laptop / 1.6 GHz / 512Meg / NVidia G-Force4 4200 Go / XP Pro SP2/ Studio 8.12.7 & 9.4.3+
S10 PC: Athlon64 3400+, 1GB, nVidia 6600 256MB, XP Home SP2
We call those "EVIL" cameras (Electronic Viewfinder / Interchangeable Lens).
Basically, if you take your DSLR and set it to "mirror open" mode, it's the same sort of thing - you have to use the LCD (or a LCD viewfinder) to compose your shots rather than using an optical image. But on the plus side, you don't have the lag of the mirror bouncing out of the way, and you can do some cool stuff, like taking continual shots when the trigger button is half-depressed, and when the trigger is fully depressed, storing several images leading up to (and potentially several images following) the actual shot that you were trying to get -- this is gGood for photographing sports or wiggly kids.
I have a friend who has a APS-sized DSLR, my dad has an EVIL. They're both really decent cameras.
Still, the biggest contribution to photo quality is the optics. Dad has a primary 200mm lens, my friend has a zoom that'll zoom to 200mm, and of the two, the shot taken with the fixed 200mm primary is superior - not because the EVIL has a better imaging system (it doesn't!), but because the optics are simpler and "cleaner".
So, whatever camera body you get, make sure you feed it with a lens that you're happy with, and life will be good.