I bought the 47LM6700 off Newegg roughly a month ago for $700. I'm currently on my third one after having problems with light bleed. The first two had really bad flashlighting in the top left and right corners respectively.
My current one, which I just received today has almost zero light bleed (just a touch on the left edge, but it disappears with local dimming on low), though it does have one stuck/dead pixel near the center of the screen. I can't see it when sitting back at a regular viewing distance (anything farther than like three feet) though.
I've seen quite a few people complain about light bleed issues as well over on avsforum in the thread for this TV. Just a warning to anyone looking at this TV. LG's quality control seems to be rather low, so you may wind up going through multiple TV's until you get one that you're happy with. I'd say if you're looking at this particular model, go with a reputable site that has solid customer service just incase you have to do a couple RMA's.
For what its worth I think LG makes some best-worst tvs you can buy. In terms of design, UI, ease of use, and overall all value you get a great bang for your buck, thats really the only good thing about their products.
However, the build quality is really iffy from tv to tv. I went through 3 LG tvs, till I got one that had really small amounts of light bleeding and flashlighting. Worst yet as my tv aged (its going on 1.5 yrs old), I noticed the refresh rate is off on some of the pixels. This gives zooming out and zooming in and panning shots in moves to have a weird checker board effect and ziggy line effect (in 2d and 3rd). Also on a totally white scene you can tell some pixels are "whiter" then other pixels. I did the LG hack and unlocked my TV's CPU/GPU settings and made it the best version of the 120HZ 47 inch display (the display and CPU are the same, LG just locks somethings out on my model), Also on a side note, don't unlock an LG tv and up the specs unless its been confirmed the CPU/GPU and capacitors are the same between a cheaper model and a more expensive model as you can really mess up the tv. I will say the THX settings and local dimming really helped, but the picture still leaves a lot to desire. I really love LG's 3d tech as it doesn't make me dizzy or give me eye strain (its really great tech for gamers), but I will say other then its 3d use its a really subpar 2d tv. I wish I spent a few hundo more and went with a sony or a samsung.