The most widely accepted promotion is the Thermador 1-2 Free promo, which seems to be ongoing. You buy a built in refrigerator, a cooking product and receive a free dishwasher.
Not surprisingly, another manufacturer has followed with an identical promotion, but only October 21-31. Very surprisngly, its Frigidaire with their Pro line.
Have a look...
Buy a Pro Refrigerator
And this is yours free (don't worry they will make it up on volume)
Frigidaire is testing the waters for sales impact for just 10 days, but their other rebates programs are still valid and can work in conjunction with a free dishwasher.