This will work for both rooted and non-rooted Xooms. If yours is not rooted, you can place this in /data/local and it will still work. If your Xoom is rooted, you can place it in /system/media or /data/local. Let me know how you like it and don't forget about the Thanks button.
adb push bootanimation.zip /data/local
Click each thumbnail for a hi-res preview