Working RAID controller card - LSI MegaRAID 8433ELP
I added a RAID controller card to my build which is detailed here.
The LSI MegaRAID SAS 8344ELP PCI-Express card:
This card is on both the VMware.com HCL and the vm-help.com HCL. I found the card new on eBay and was able to buy it for $95 shipped. It came with the driver CD from LSI, which was not needed for ESXi 4.1 because the drivers are already included in the system.
Install was very simple and only took about 10 minutes. I used this 3Ware cable purchased from Newegg.com
I setup my 2x1TB WD Caviar Blue HDD as RAID-1. The most difficult part of the process was typing CNTL-H fast enough during bootup to get into the LSI RAID configuration software.
The only negative I know of with this controller is it has a 3 Gb/s transfer rate, and the drives are capable of 6 Gb/s. My system is not I/O intensive so it probably won't matter much to me and the price was certainly right.