During a clean install from alpha2 DVD both network cards are detected properly (e100, ipw3945) selecting the ipw3945 shows a remark:

"Unable to configure the network card because the kernel device is not present" 

After installation hwinfo shows:

hwinfo --network
37: None 00.0: 1070a WLAN                                       
  [Created at net.124]
  Unique ID: 36u+.QXn1l67RSa1
  Parent ID: JNkJ.vmyQlf1bSk6
  SysFS ID: /class/net/wlan0_rename_re
  SysFS Device Link: /devices/pci0000:00/0000:00:1c.0/0000:01:00.0
  Hardware Class: network interface
  Model: "WLAN network interface"
  Driver: "iwl3945"
  Driver Modules: "iwl3945"
  Device File: wlan0_rename_re
  HW Address: 00:13:02:18:12:ac
  Link detected: no
  Config Status: cfg=new, avail=yes, need=no, active=unknown
  Attached to: #7 (WLAN controller)

38: None 01.0: 10701 Ethernet
  [Created at net.124]
  Unique ID: L2Ua.ndpeucax6V1
  Parent ID: JNkJ.vmyQlf1bSk6
  SysFS ID: /class/net/eth1
  SysFS Device Link: /devices/pci0000:00/0000:00:1c.0/0000:01:00.0
  Hardware Class: network interface
  Model: "Ethernet network interface"
  Driver: "iwl3945"
  Driver Modules: "iwl3945"
  Device File: eth1
  HW Address: 00:13:02:18:12:ac
  Link detected: yes
  Config Status: cfg=new, avail=yes, need=no, active=unknown
  Attached to: #7 (WLAN controller)

39: None 00.0: 10701 Ethernet
  [Created at net.124]
  Unique ID: usDW.ndpeucax6V1
  Parent ID: rBUF.GBRhHvE6U06
  SysFS ID: /class/net/eth0
  SysFS Device Link: /devices/pci0000:00/0000:00:1e.0/0000:07:08.0
  Hardware Class: network interface
  Model: "Ethernet network interface"
  Driver: "e100"
  Driver Modules: "e100"
  Device File: eth0
  HW Address: 00:16:36:34:25:66
  Link detected: yes
  Config Status: cfg=new, avail=yes, need=no, active=unknown
  Attached to: #6 (Ethernet controller)

40: None 00.0: 10700 Loopback
  [Created at net.124]
  Unique ID: ZsBS.GQNx7L4uPNA
  SysFS ID: /class/net/lo
  Hardware Class: network interface
  Model: "Loopback network interface"
  Device File: lo
  Link detected: yes
  Config Status: cfg=new, avail=yes, need=no, active=unknown