I called the Kroger on Independence Square in Franklin (off Hillsboro Rd.) and they ARE participating in triples!! I am SO excited about this! The new Harris Teeter that opened over in Westhaven is the reason for this. The other usual locations seem to be participating as well (bellview, brentwood, etc.)
This means they will triple coupons with a face value of up to $.99! You can only do 20 coupons per transaction (In the past, Kroger has allowed back to back transactions), and if you are tripling at Harris Teeter, its 20 coupons per day.