VBoxManage setextradata "Ubuntu Server" "VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/HostPort" 2222
VBoxManage setextradata "Ubuntu Server" "VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/GuestPort" 22
VBoxManage setextradata "Ubuntu Server" "VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/Protocol" TCP

VBoxManage setextradata "Ubuntu Server" "VBoxInternal/Devices/pcnet/0/LUN#0/Config/django/HostPort" 8888
VBoxManage setextradata "Ubuntu Server" "VBoxInternal/Devices/pcnet/0/LUN#0/Config/django/GuestPort" 8000
VBoxManage setextradata "Ubuntu Server" "VBoxInternal/Devices/pcnet/0/LUN#0/Config/django/Protocol" TCP

VBoxManage setextradata "Ubuntu Server" "VBoxInternal/Devices/pcnet/0/LUN#0/Config/http/HostPort" 8080
VBoxManage setextradata "Ubuntu Server" "VBoxInternal/Devices/pcnet/0/LUN#0/Config/http/GuestPort" 80
VBoxManage setextradata "Ubuntu Server" "VBoxInternal/Devices/pcnet/0/LUN#0/Config/http/Protocol" TCP

Source: http://michaelhallsmoore.com/blog/Running-A-Local-Web-Development-Environment-With-VirtualBox

VBoxHeadless -startvm "Ubuntu Server"

Source: http://forums.virtualbox.org/viewtopic.php?t=6663

mount -t vboxsf sharename /home/username/mountpoint -o rw,exec,uid=1000,gid=1000,dev

Source: http://ubuntuforums.org/showthread.php?t=659431