How to show all the USB devices dimmed in grey in VirtualBox

Grabbed this from here.
Basically, with setting up correct user group, all the dimmed devices come back to be ready. No.2 concerns iPhone and iPod Touch because it has a problem in connection in recovery mode.
For making VirtualBox work with iTunes, see this page.

1. Setup correct user group
Try this:
1. In the host (10.04 Lucid), System->Administration->Users and Groups
2. Click Manage Groups.
3. In the Groups settings List Box, navigate down to vboxusers
4. With vboxusers high lighted, click properties
5. Click the check box next to your user name to indicate you want you to be a member of the vboxusers group.
reboot the host.

2. Created a USB filter in VBOX, cleared all of the fields except for the "Vendor ID" field.