reply to Xoom user
Don't have a specific answer to your direct connection question, but I have a work around, if I can be helpful.
If you are just looking to move files between your Xoom, and ubuntu PC, I'd suggest using Dropbox. Of course, you may be wanting to direct connect for other reasons, but for just moving files this is the easiest way, even with a Windows PC. Just keep in mind that Dropbox is not secure, but for non sensitive stuff like music, and video it works great.
This is my referral link, if you don't already have an account.
I'm with the Central Government. I'm here to help you. Now bend over, really, I'm helping you, just, just stay still. You'll feel better in a moment.