Some people for example are pretty easy to guess:
BigJim (he's 6'9")
VtwinVince (Honda VTR)
Good Old Pete (I dont think hes quite THAT old)
What made you choose your handle?
Darkstar was once a code name for a classified UAV
(Unmanned Arial Vehicle) for the US airforce I believe.....
similar to the Predator project.....just thought that it sounded cool.