My immediate response would be to check the speed of the USB drive against a share on the internal disk (assuming you still have the USB drive attached). Also make sure that DNS is resolving correctly and that the Eee knows about the client end. Also check the speed of your network interfaces.
s/
-- ubuntu-uk@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-uk https://wiki.ubuntu.com/UKTeam/