# cat /proc/cpuinfo 
processor       : 0
cpu             : 7447A, altivec supported
clock           : 1333MHz
revision        : 0.2 (pvr 8003 0102)
bogomips        : 1327.10
machine         : PowerBook6,5
motherboard     : PowerBook6,5 MacRISC3 Power Macintosh 
detected as     : 287 (iBook G4)
pmac flags      : 0000001b
L2 cache        : 512K unified
memory          : 1280MB
pmac-generation : NewWorld

When my network connection is up and running:
 # ethtool eth0
Settings for eth0:
        Supported ports: [ TP MII ]
        Supported link modes:   10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
        Advertised auto-negotiation: No
        Speed: 100Mb/s
        Duplex: Full
        Port: MII
        PHYAD: 0
        Transceiver: externel
        Auto-negotiation: on
        Supports Wake-on: g
        Wake-on: d
        Current message level: 0x00000007 (7)
        Link detected: yes

And just after waking the machine from sleep:
# ethtool eth0
Settings for eth0:
        Supported ports: [ TP MII ]
        Supported link modes:   10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
        Advertised auto-negotiation: No
        Speed: 100Mb/s
        Duplex: Full
        Port: MII
        PHYAD: 0
        Transceiver: externel
        Auto-negotiation: on
        Supports Wake-on: g
        Wake-on: d
        Current message level: 0x00000007 (7)
        Link detected: yes