I have the Netgear WG511 (Made in Taiwan) and this works most of the time. It is a Prism GT chipset. The WG511 made in China does not work even though "lspci" indicates that the chipset is also Prisim GT.
My friend has the Netgear WG511U and he says it works great. I believe it is an Atheros chipset.
Finding a G wireless card that works reliably has been a major challenge. Most of the web sites list the old B only cards.

SKrall