This CD special doesn't seem to be listed on the bank's website. A reader mentioned seeing it in a Sun Sentinel ad. I called this morning for more info. It just started last Friday so it should last for awhile. I was told that it's available at all of their branches which not only includes several in Miami and South Florida, but also one in Manhattan, New York and one in Houston, Texas.
Commercebank has been FDIC insured since 1979 (FDIC Certificate # 22953).
Thanks to Mike who mentioned this CD in the finding deals post.