Does anyone know of some commandline util to display the public IP you're coming from, even behind NAT? I know I could wget something like www.whatismyip.com or similar but I'd prefer to be a bit cleaner.
Well, Tim, if it's NOT behind NAT, your util would be ipconfig .
From behind NAT... you could see if you can find some open source DynDNS updater and hack that. Or you put a PHP script on a webspace that only echoes back the $_SERVER['HTTP_REMOTE_ADDR'] value and wget that...