I am using a 3ware 7500-4 controller with a 4 drive raid 10 array. YaST immediately detected the card and had no problems installing on the drives it controlls. Overall performance is very good.
The only thing preventing me from rating this card higher is my inability to get the 3dm disk management utility to operate properly. Attempts to use the disk manager result in a blank page regardless of the browser used. This may be due to the fact that the recommended version of 3dm was written for the driver provided by 3ware for 2.4.x kernels and not the drivers provided by 2.6.x kernels.