I had no WLAN (wireless network) card, so I had to buy one in order to avoid the cables all over my apartment. And so I (accidentally) did, a Linksys WUSB54GC. After a few minutes surfing, I found out that it had the Ralink RT73 chipset, yielding an installation of the rt2x00-kmp-default-package:
zypper install rt2x00-kmp-defaultI tried with the rt2500 at first, but it didn't seem to work - as far as I read, it's also to another chip-set, so it's not that weird after all.
Besides this I also installed a firmware from http://www.ralinktech.com/ralink/Home/Support/Linux.html (Firmware RT2501USB(RT2571W/RT2671)), but I really don't know it's actually required - and I'm to lazy to find out (it's Saturday!).

October 20th, 2007 at 09:42 (UTC)
I found out that the firmware actually is needed.
October 20th, 2007 at 14:56 (UTC)
What a nightmare...
Add the following lines in /etc/modprobe.d/blacklist:
blacklist rt73usbblacklist rt2500usb
Remove these (the blacklisted) modules:
modprobe -r rt73usbmodprobe -r rt2500usb
You may have to install kernel-headers if the following steps after this don't work:
zypper install linux-kernel-headers kernel-sourceDownload drivers (remember to install the firmware, too, as mentioned in the post) from http://rt2x00.serialmonkey.com.
Extract it and navigate to the Module-directory and follow the instructions in the README-file (including the config-section).
You an put rt73 in /etc/modules to automatically load it at boot.
October 20th, 2007 at 16:52 (UTC)
And yeah - go to Yast -> NICs and disable NetworkManager (or at least I should because this new computer is not a laptop) and then read
http://susewiki.org/index.php?title=Setting_up_RT61_Wireless_Cards#Installation_and_initial_Configuration - now I'm up'n'running (just changed the 61 with 73 and some WPA2 instead of WPA, as for AES instead of TKIP)!