Until now the only solution I had was to plug it into my primary desktop and share it which wasn’t optimal, I originally tried to run Xen under Solaris with a Windows XP guest but the support for USB bridging isn’t there yet.  I switched to VirtualBox but the attempts to get it to mount the usb device were always failing with errors in /var/adm/messages

Aug 30 14:31:04 XXX VBoxUSBHelper[2093]: [ID 387370 user.error] VBoxUSBHelper: /usr/sbin/update_drv -a -i pci1043,8277@1a,7/printer@2 ugen
Aug 30 14:31:04 XXX VBoxUSBHelper[2093]: [ID 387370 user.error] VBoxUSBHelper: /usr/sbin/update_drv -a -i pci1043,8277@1a,7/printer@2 ugen
Aug 30 14:31:05 XXX VBoxUSBHelper[2095]: [ID 387370 user.error] VBoxUSBHelper: /usr/sbin/update_drv -d -i pci1043,8277@1a,7/printer@2 ugen
Aug 30 14:31:05 XXX VBoxUSBHelper[2095]: [ID 387370 user.error] VBoxUSBHelper: /usr/sbin/update_drv -d -i pci1043,8277@1a,7/printer@2 ugen
Aug 30 14:31:05 XXX VBoxSVC[1688]: [ID 734376 user.error] USBProxy: failed to capture device Hewlett-Packard HP LaserJet 1020.
Aug 30 14:31:05 XXX VBoxSVC[1688]: [ID 734376 user.error] USBProxy: failed to capture device Hewlett-Packard HP LaserJet 1020.

Typing in the command manually showed that ugen wasn’t able to be properly mounted,  poking around I found some articles about getting cameras to operate under Solaris and  followed them to remap the printer device as a ugen as far as Solaris was concerned (Since I can’t actually reliably print with the printer under Solaris anyways this was no loss).

After that I hotplugged the printer and was able to finally mount and share the printer under my windows XP VirtualBox instance.

Hopefully this will help others who want to get a similar situation resolved with VirtualBox and Solaris.