Well my initial success with host mode was a bit premature it seems.

Some of the time a device is detected just fine and accessed with no problems. I have a USB hard disk and hub that shows up in file manager as well as additional devices plugged into the hub.

However from time to time one of two things happen...

No indication of device being plugged in at all, including "lsusb".

Get a device unrecognised warning followed by a no filesystem warning. N800 locks up and reboots.

Anyone else seen this? OS2008 btw.