I'm in exactly the same boat as you (Belkin F5D6020, SUSE 9.0, newbie), and have spent days Googling for answers. I have the ver 3 card, which I believe is based on the RTL8180L chipset - which appears to be problematic based on all I've read.
Thing is, no seems to have come up with a consistent answer. Some say you need to download the latest drivers from RealTek, but the kernel they say their driver works with is older than the current kernel in SuSE 9.0, it involves compiling and 'making' (which I consider spooky, being a newbie and all). I've also come across NDIS wrapper sites that claim to be able to take the mfg's XP drivers and "translate" them to Linux. I've seen all kinds of different configs, etc., and just am at a loss as to what to do next.
I guess when it all comes down to it, I'm worried about hosing my system, which installed perfectly on a Toshiba Portege 7020. Everything works, including connecting to my AP via ethernet, but the little ol' card just sits there doing nothing.
Any help would be appreciated. Am trying to give this laptop to my son, but it's worthless to him w/o web connectivity.
P.S. I wonder... does having an installed eth0 (that works when connected) screw up the wlan0? Do I need to write a script to comment that out when booting?