Was nationwide, now Missouri & Arkansas only.
Their website says "Rates as of November 1, 2011". My calculations show it was still 5.01% through November, so do not know if the webpage is wrong or if accounts were grandfathered at the previous rate.
"*Reward rate 4.01% Annual Percentage Yield (APY) paid on balances between one penny and $15,000, and 0.75% APY paid on the portion of the balances above $15,000 each cycle the qualifications are met."Kasasa Cash Checking Account | Poplar Bluff - Dexter | MO | Jonesboro - Paragould | AR | Southern Bank
The only reason a bank would not courtesy notify their customers of a rate change is so the bank can take advantage of those who do not pay attention.