The 'Super Dangerous Wub Wub Edition' is available to pre-order from all UK retailers for £89.99/€100. This is probably one of the coolest pre-order bonuses I have seen. I LOVE when you get physical items, and not just in-game content and a map.
In this limited edition pack you get yourself a 12-inch replica of the Dub Step gun, an 8-inch Johnny Gat statue and a pocket-sized dub step doomsday button. The weapon plays "sweet tunes directly from the in-game Dub Step Gun" and also rocks a laser sight.
The 'Super Dangerous Wub Wub Edition' also contains the in-game Commander in Chief pre-order items, such as the American flag outfit and Merica' gun.