There will be two MAC addresses one for the wired and one for wireless:
You can find them by looking in connection manager, select LAN 0 (or a wireless connection) edit, connection properties TCP/IP
There will be a hardware address.
or
If you want a bit of terminal:
alt & F2, type the word "terminal" and then click run.
at the prompt type "SU" <hit return>
then type "ifconfig -a" <hit return> There is a space before the minus sign.
you should then see something like:
ath0 Link encap:Ethernet HWaddr
00:22:68:91:84:8C
inet addr:192.168.1.107 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5047 errors:0 dropped:0 overruns:0 frame:0
TX packets:5372 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:3359909 (3.2 MiB) TX bytes:758287 (740.5 KiB)
eth0 Link encap:Ethernet HWaddr
00:1E:62:8C:23:91
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
The items in bold ate the MAC addresses (yours will be different)
The ath0 is the wireless one, the eth0 is the wired one.
There will be other stuff, ignore it.
Guru's and geeks please correct me if I got it wrong, I am learning this stuff
