Coming back to the initial question of a comparison between both screens:
I recently found another 6930p with a WXGA (1280x800) LED ("Illumi-Lite") screen for sale and instantly bought it - mainly because I wanted to have a direct comparison of the screen to my existing 6930p with a WXGA+
CCFL (1440x900) display. I urgently needed to know what I'd miss out otherwise - especially since I really like the WXGA+ LED on my friend's
ThinkPad T500 or the LED screens on both my
eee netbooks. The ultimate plan of course was to swap both display...
So, for everyone who's ever been wondering about the difference between the
WXGA+ CCFL and the
WXGA LED screen, here's my visual take on it. Enjoy!
LEFT: HP 6930p with
WXGA LED, Intel 4500MHD, DISPLAY = Samsung LTN141AT06, WXGA = 1280 x 800, 2.344gr with 6cell battery attached
RIGHT: HP 6930p with
WXGA+ CCFL, ATI 3450, Display = AUO AUO3047 (accidentaly deleted the pics that show the actual part number of the screen), WXGA+ = 1440 x 900, 2.424gr with 6cell battery attached
Displays set to maximum brightness.
Indoors, in a darkened room:

90°

~140°

~ 75°

With flash.
Outside:

@ minimum brightness (!)
A full set of images is available
here.
My preliminary verdict is that the LED version isn't much better on the HP.
I don't know what's so "Illumi-Lite" about the LED screens, but
viewing angles aren't any way better than on the WXGA+ CCFL version. And those are really horrible as the user "students" already
mentioned. Even the LED on my
Asus eee 1000HG is better than this HP Illumi-Lite LED (and the LED on the 1000HG is worse than the one on the 1000H, btw).

HP 6930p LED vs. Asus eee 10000HG LED
Colours are much more vivid on the small eee LED as well as on the WXGA+ CCFL - even though the opposite seems to be true judging by the images alone. I am afraid I really couldn't catch this on camera. I also asked my wife (as an outsider) to judge on picture quality and she also preferrred the CCFL version. The WXGA LED clearly wasn't designed for any colour editing even though HP calls this a business machine. I wonder why HP sells these screens. The LED version may be better compared to the CCFL WXGA version, but it isn't compared to the WXGA+ (and I am saying this as a former nx8220 user which only had WXGA and was ok for me).
The LED version has a really nice battery runtime compared to the 12W-sucking ATI gfx. I'd say it's about an hour you get on top of the WXGA+ / ATI version, but of course this solely depends on what you're using on the machine.
I really like the way brightness is set on an LED screen, but this version here has some dead pixel which is why I won't exchange it with the one on my ATI machine. I'll have to sent it back to dealer and yes, I could also send it to HP for a repair, but the last time I did so, these folks from JABIL in Poland removed the business card holder on the back for no apparent reason and also never fixed the display lock so I am trying to avoid these folks by any means.
Another advantage on the LED version is that there's no light leakage as seen on the bottom row of my WXGA+ screen.
I think that HP really has to rethink the LED strategy (if any) and do it like
DELL when they announced that all notebooks shall from now on come with an LED screen. HP, are you listening?