The instructions on http://www.houseofcraig.net/acx100_howto.php worked for my D-Link AirPlus DWL-520+ with Fedora Core 2 and Slackware. The pages are very detailed. Craig (the author of the pages) found that SimplyMepis worked "out of the box" with his adaptor, but it didn't work with my card.
Ubuntu http://www.ubuntulinux.org/ recognised my card "out of the box". There is a live-evaluation version of Ubuntu, called Gnoppix, but this didn't recognise my card and I didn't like it as much as Knoppix or the hard disk install of Ubuntu.
HTH.
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Zymous
