Who uses Virtualbox when you could use Virtual PC or VMware?
Okay, my little rant on those are pretty simple.
I could of got a free copy of VMWare Workstation from a relative, who happened to work at VMWare, but VMWare Player is a bitch to set up, so it server. Virtual PC isn't made for other OS'es like Darwin and BSD either.
I'd rather use this, but I'd like to use my real hardware, so I partitioned my HD to use Linux or Darwin.