How to find/display your MAC Address

Windows

* Windows NT/2000/2003/XP
* Windows 95/98/ME
* DOS/Windows 3.11/Windows for Workgroups

Macintosh

* Macintosh OS X
* Macintosh OS w/ Open Transport (Pre-MacOS X)
* Macintosh OS w/ MacTCP (Pre-MacOS X)

UNIX/Linux

* Linux
* Solaris/SunOS
* FreeBSD/NetBSD
* OpenBSD
* Caldera/SCO UnixWare/OpenUNIX
* HP-UX (HP UNIX)
* IRIX (SGI UNIX)
* NeXTStep (NeXT UNIX)
* AIX (IBM UNIX)
* Tru64 UNIX (Digital UNIX)

http://www.coffer.com/mac_info/