Wi-Fi

• get WG511DCB.arm from prism54.com or somewhere else (not as easy to find as you'd think) [1.0.4.3.arm?]
  
• rename it into isl3890
  
• copy it into /lib/firmware
• add "alias eth1 islpci_cb" to you /etc/modprobe
  
• bring up the interface after instering the PCMCIA card - "/sbin/ifconfig eth1 up" (/sbin/ifconfig/ eth0 down)
• it helps to have wlassistant installed (yum does it for you painfully enough)
• Try to connect to the network of choice. Don't forget to select DHCP in the network config.
• Cross your fingers and wait
• Alternatively
  

http://sourceforge.net/projects/ndiswrapper
Unfortunately this involves patching and recompiling the kernel, which is always fun.