I have personally bought shares of WAMUQ after hours. The order was placed after hours and filled prior to market open. I've posted that a few times now.
Everyday Etrade will have bids and ask after hours...several mornings there will trades pre-market....I bet with a strong close we had this evening there will be pre-market trades tomorrow....I have put in after hours orders before at a price too high or too low just to see if the order would take and then cancel....so in my book at least some pinks trades before and after hours.
News 
Market Data 
Discover 
