Picked up my UN55D7000L yesterday, thought I'd throw in my two cents.

Ordered from Best Buy on 3/30 - picked it up on 4/2. I'm upgrading from a broken UN46B8000.
Came with the QWERTY remote in the box, no voucher.
Has firmware 001004, no higher rev available via online check.
Stickers show "Version: H302" on the box and on the back of the TV. (does anyone know what that translates to?)
The wireless works well and was a snap to set up on my Netgear WNDR3700 router (which I highly recommend)
At first I didn't like the stand but it's growing on me.
The low-profile bezel is GREAT. I thought it was silver like the stand from the pictures I saw on the web but it's actually clear.
It runs very cool to the touch, hardly any heat coming off the back.
There is flashlighting and corner bleeding, however:
After reading for a few hours it seems I'm not alone, many report the same issues across the web on different brands of LED TV's.
I'd say, from what I read; (and no flames please) it's just the way it is and no LED panel is going to be perfect- especially if you like your screen on the brighter side. I can get rid of it by cranking down the brightness and backlight settings, but personally; I don't see how you guys can view with a backlight setting under 13 on this TV. I will admit, I do like a brighter picture on all of my screens, phones etc.. Maybe it's just my eyes.
As others have mentioned, I probably won't notice the imperfections 95% of the time under normal viewing and perhaps never if I didn't read forums

It's easy to obsess over it however, especially after the price paid. I'd consider exchanging it for another one but I doubt the replacement would be any better. Opinions?
One "flaw" with the TV is, it really brings out the limitations of lower-def viewing. I can't blame the TV for that however! At first, I really was not impressed with the TV but after some tweaking and checking out a couple of Blu-Rays, I then understood that I was only seeing the limitations of the lower quality material. Going from a 46" to a 55" is HUGE! Not long after I bought my 46", I knew I should have went bigger. The 55 is a massive upgrade.
If you're a Rush fan, you must quickly get on Amazon and order "Snakes And Arrows Live" [Blu-ray]. WOW!! At this point, that will be my "Demo" for the TV, just wow.
"Dave Matthews & Tim Reynolds: Live at Radio City Music Hall" on Blu-Ray is excellent too, I'm not a big DM fan but the blu-ray is incredible.
The same goes for John Mayer: Where the Light Is - Live in Los Angeles [Blu-ray]
I wish "The Eagles - Farewell 1 Tour - Live From Melbourne" was 1080p - what an excellent concert, the DTS mix on that DVD is up with the best I've ever heard.
The Netflix app seems to work well, the experience is much better than on my BD-P1600 player.
The YouTube app really needs work in my opinion, hopefully it will improve.
Ok, enough.
Overall, I'm pretty charged up about it.
**EDIT**
The clouding is starting to bother me.. There's pretty good corner bleed in the bottom left too. Should I really deal with this on a 3K TV??
Grrrr