I broke down and ordered a Roomba today. Next thing I'm seeing are banner ads for the Roomba.
Re-targeting me? YES, but I purchased one.
I purchased one through Google Checkout - my guess is there was no cancellation pixel on the thank you page.
Either way not a big deal, intent has been shown, so show me ads about the Roomba.
When people talk about better targeting for better ads, this is the first step. Much better than seeing an ad about punching a monkey.