I picked up some of the Champion "Premier" lightweight running shoes from Target last week. Not sure what they weigh, but they're about as light as my Kinvaras (with a firmer ride) at a third of the price. I've been running in them a week and love them. Time will tell how long they last, but I'm sure I can get my usual 500-600 miles out of 'em.
I'll bet if they slapped a Nike/NB/Asics/Saucony/etc label on them people would pay $100 for them.