To get any usb devices to work you need this line in /etc/fstab:
none /proc/bus/usb usbdevfs defaults 0 0
For the webcam check with the command "groups" that you're in the video group, if not do as root:
adduser samkupar video
There's a how-to on webcams here: http://www.linux.org/docs/ldp/howto/Webcam-HOWTO/
You should also check with "lsmod" that you have usb modules loaded.
As for the printer have a look at: http://www.linuxprinting.org/show_pr...um=HP-PSC_1210
A user note there says it should work with debian.