There's some information here about this thing that's fairly useful:

http://web.archive.org/web/20060314030428/http://www.2ndwave.com/readme.asp?ProductID=53&mscssid=EQXWUBX3KQCS9LWV1G1K3T0KW9TT13S2

The general page with info on these is at:

http://web.archive.org/web/20060314025641/http://www.2ndwave.com/support.asp?ProductID=53&mscssid=EQXWUBX3KQCS9LWV1G1K3T0KW9TT13S2

Drivers are available there too (the PN200 drivers should work with all versions).