I have a Dlink DCF650W 802.11b wireless card that works fine on my home
network, but won't work with the wireless drivers under netbsd.  I've
run into this problem before, an 802.11g WAP and one of my 802.11b
wireless cards.  They will connect to 802.11g WAPs, but only with the
correct drivers.  Evidently, the supplied driver for the DCF650W won't
connect to, or see (wiconfig -D), my 802.11g WAP.  It works OK with an
802.11b WAP.  The DCF650W is a Prism 2 chipset.

How do I get updated drivers that will connect to an 802.11g WAP?