I'm trying to get the WIFI working on my iMX233-OLinuXino-MINI-WiFi.
I've followed the instructions on http://www.eewiki.net/display/linuxonarm/iMX233-OLinuXino and I've got a working boot SDCard. Once it boots, I don't have network access. I don't see the wlan0 device in /dev, and I don't know how to list network devices (ifconfig seems to be missing). I see some lines in the boot log that seem to refer to the WIFI card missing its firmware, but I'm not sure where to get it, where to put it, or even if that's the real problem.
The last 3 lines from the boot log re: wifi:
[ 8.850000] rtl8192cu: Loading firmware rtlwifi/rtl8192cufw.bin
[ 8.870000] usbcore: registered new interface driver rtl8192cu
[ 8.930000] rtlwifi: Firmware rtlwifi/rtl8192cufw.bin not available
(whole log is at http://pastebin.com/RS73tjun)
I got it working just last night.
I followed the instructions at this link for flashing the system image having all the drivers included for wifi hw.
Then I set up the wifi network just running the script wifi-menu from the console.
Hope that helps.
Have a nice day!