Hello.
Wireless LAN is not widely supported for Solaris.
I've ported a driver for USB WLAN devices using the ZD1211 chip from Linux to Solaris. Currently only devices that additionally use the AL2230 chip are supported (see "zd1211sol" project in SourceForge).
The driver works under OpenSolaris/x86 but it makes a lot of problems under Solaris 9/Sparc. It is not known how it works under Solaris 10 or OpenSolaris/Sparc.
It is a beta driver that still has bugs and it is not supported by Sun.
Martin