laptop-net 2.26-8.1 (i386 binary) in ubuntu karmic

 The laptop-net package supports the built-in Ethernet of laptops by
 providing several integrated features that automatically adapt the
 laptop to the network environment. The package is easily configured
 to support a wide variety of network environments, and supports
 manual as well as automatic management of the network interface.
 .
 Laptop-net can automatically: start and stop the network interface at
 appropriate times; disable the network interface when the network
 cable is removed, and enable it when the cable is inserted; select
 the network interface's IP address, either by probing the network for
 known hosts or by use of the DHCP protocol; customize the laptop's
 software configuration to match the network interface's IP address.