Yes. Support for USB 2.0 high-speed hard drives, flashdrives, CD drives, and DVD drives was added in BootIt NG version 1.50, and is available in the Partition Work dialog.
Likewise, support for IEEE 1394a and 1394b (e.g. "FireWire®") high-speed hard drives, flashdrives, CD drives, and DVD drives was added in BootIt NG version 1.60.
Please note that to use a USB 2.0 or IEEE 1394 device, you must first enable the applicable option in BootIt NG's settings. To enable USB 2.0 support, select the USB 2.0 Support option. To enable IEEE 1394 support, select the IEEE1394 Support option. With those settings enabled, the USB 2.0 and/or IEEE 1394 drives will be enumerated after the BIOS drives. USB and/or IEEE 1394 CD/DVD drives will be located under the CD radio button.