Like the Speedtouch, the WL110 also uses the Agere driver. Get the CE version here:
http://www.hpcfactor.com/support/cesd/h/0031.asp
Inside the ZIP file, you'll find another named
Inflated.zip. Open that, and inside find the file
wireless.SA1100.CAB. Copy that to the 900 and run it on the device to install the driver. When you insert the card, if it asks for a driver, type in
wlags406. Now tap on the signal bars in the system tray and select "Open Wireless Profiles." There's a WiFi scanner interface there that'll allow you to find and connect to the network of your choice.