This was last weeks news. The price tag is 7 times revenue. This is not 100% comparable to GMC, but when you look thorugh the industry it is ripe for consuladation.
"In a move that could shake up the ranks of the online poker industry, gaming company BETandWIN is reportedly in takeover negotiations with Ongame, a software provider and owner of internet poker site Pokerroom.com. The two companies signed a memorandum of understanding this past week regarding the potential acquisition. If negotiations run successfully, and BETandWIN acquires Ongame's technology, as well as Pokerroom.com, BETandWIN would become one of the largest online gaming firms worldwide, second only to PartyGaming. The price of runner-up status in the online gambling business: a neat little €500 million (~$591 million). "