Hey Peter - Here's my two cents worth!
If you want to get these jerks where it hurts, generate a little negative publicity.
Go on epinions and give 'em hell about LG's lack of customer service, blog on THS, e-mail Consumer Reports, write the store where you purchased the set and tell them you will go out of your way to let everyone know NOT to buy ANY LG products!
Do you have a consumer advocate on your local television stations? Contact them and tell them about your difficulties. I know our local advocate just salivates at these types of stories. Are you familiar with Tom Martino, a nationally syndicated consumer advocate? Contact his office. He would relish the opportunity to "sock it to" LG. He hates bad customer service, dishonesty, and ripoffs!!
Good luck Peter! Don't get mad; get even!! Bad publicity is the deathknell of these mega corporations. Remember, they like to answer to the shareholders, not the consumers!!