Samsung got the memo and found out where one of their competitors, the Motorola Q, failed and has compensated for it. Someone ordering a couple Samsung Blackjacks was pleasantly surprised when the retail packages included the extended battery. The weak battery life and need of the extended battery is what really hinders the Q.
I am not a Blackjack user, but I happily salute and applaud companies that include the extended batteries with their products. Lets just hope more companies catch on.