I've seen that tool before, I gotta admit it's definitely cool looking, I'd buy it. But I'm a sucker for things like that, I'm a tool nut.
However, I see this tool as a solution looking for a problem. They look great, and you really want to find a use for them just to justify buying one, but for all practical purposes they really aren't very useful. They are meant for a very specific job, so if you're a contractor demolishing houses for a living, then maybe you'd find it useful. But for the typical person this is more of a want than a need.
Honestly, how often do you use the Fubar's? I have two also, and aside from some very specific jobs or just to have fun, they aren't my first choice for tools. What could the Annihilator accomplish that your fubars, fire axe, and crowbars wouldn't?