I noticed recently that on OpenSolaris‘ wireless support page, the malo driver (from OpenBSD) for the Marvell 8335 chipset is now available (though at version 0.1). If you are using OpenSolaris on a laptop, this may be the way to go.
Also listed is a driver for the ZyDAS 1211 chipset (a USB wireless chipset), another that I’ve mentioned in the past. The driver is the zyd driver and is also at version 0.1.
There is a fabulous list of all the OpenSolaris drivers and the devices they support. With a printout of this list, you can be sure of getting a card which is well supported by OpenSolaris – and perhaps by other UNIX variants and by Linux as well.