I havent seen this my self, I know that they did stop but really couldnt see any advantage in them using them now after changing to pulling infomation from the webpage its self.
I don't use Meta tags apart from keywords and havent found any problems in rankings my self. So maybe it was just some thing that look liked they were using them, have you got any exsamples on what you have seen?
As it would be intresting to look into this more
