automatic configuration of network interfaces (ifplugd?)

Hi, I have a thinkpad T42p notebook on which I run Suse 9.1. It has two network interfaces - eth0 (802.11 wireless) and eth1 (wired ethernet). I roam around a lot with this notebook and I would like a way to auto-configure my network interfaces. Currently, I always have to manually do ifdown eth0 ifdown eth1 ifup eth0 to enable wireless. Or, do ifdown eth0 ifdown eth1 ifup eth1 to enable wired ethernet. I read somewhere than ifplugd can be used to do something like this. What is your suggestion about how to do this? thanks, Osho