PocketCloud is a android app that enables remote access from Xoom to Windows or Mac desktops over WiFi and 3G/4G networks.
PocketCloud usethe RDP or VNC protocols and you can remotely
access any file and run any application on your computers. It works fine on my Xoom tablet, but it can't get any file from computer as FTP.
Download Wyse PocketCloud RDP/VNC from Android Market.