The SkullyBoom 2 - or SB2 - is currently available for pre-order in Gunmetal Grey. Actually, it appears that it's more of a pre-order notification, rather than an actual pre-order. Nevertheless, this is the wireless SkullyBoom, featuring Bluetooth 2.0 wireless connectivity.
I've never heard the sound quality on the SB1...anyone out there have one? I just remember when these were little vinyl figures produced by Urban Warfair. He's come a long way.