Woo hoo! Decided to have another whack with the Wireless Network CF card I got for my birthday (in September!) with the Zaurus. It works! I think the trick was not trying to be too clever, last time I was trying to install kernel modules and all sorts, turns out I needn't have bothered. I manually set the ESSID on the WAP, so I'd know what it was, and then typed it into the Wireless Network config, but it didn't work until I changed it from 'Ad Hoc Network' to 'Infrastructure'. Suddenly I can see how bad all my sites look in a 240x320 display...