I popped my N800 into USB Host mode using the USBControl and was able to have Canola see my large MP3 collection on a 350Gb external disk. I used the simple mini-USB adapter discussed elsewhere in this forum. I had to mount the disk to /media/mmc2/floppy for Canola to see it.

Seemed to work okay, but with a large collection it can take quite a while for Canola to log in all the songs. With that song collection and the nice library of Internet rradio stations in Media Player, my N800 is spending more time teathered to my stereo as the house music system and less time walking around with me!

All this was with an externally powered USB HD, so much respect to those of you who were able to get this working with portable power!

If you are willing to spend the extra bucks, you might consider the Socket Mobile Power Pack (http://www.provantage.com/socket-ac4...4~7SOCK04X.htm). I've used mine pretty successfully for several years to power my N800, iPod, external speakers and several other things. It is always nice to have that extra power on hand!