So looks like ST is NOT nixing the program. Got an email today (which clearly wouldn't apply to me since I already have a ST debit, but now I'm wondering if I should cancel it and reapply to get the bonuses...LOL):

Ready for a one-of-a-kind debit card that actually rewards you? Here's one that deposits miles directly into your SkyMiles account. You can earn up to 25,000 bonus miles with the SkyMiles World Debit Card from SunTrust. What's more, when you use your Card for everyday purchases, the miles add up quickly — and they'll never expire.
Here's how it works:
• Present this email at your nearest branch, or call 1-800-650-7277 and mention this offer.
• Get 5,000 bonus miles when you open or upgrade to a new qualifying SunTrust Signature Advantage Checking account with a Delta SkyMiles Debit Card and make your first qualifying purchase. If you already have a Signature Advantage Checking account, ask to upgrade your debit card to a Delta SkyMiles Debit Card.
• Get an additional 20,000 promotional bonus miles when you make 20 qualifying purchases within the first 90 days of account opening.
Continue to earn miles just for using your Card:
• Earn 1 mile for every dollar spent on everyday purchases like groceries, gas and restaurant purchases.1 (up to 4,000 per Card monthly)
• Earn 2 miles per dollar on all direct Delta purchases including flights, Delta Sky ClubŪ passes, in-flight purchases of food and beverages and more.1
• Apply your miles toward upgrades and Award Travel to more than 1,000 destinations worldwide2 on Delta and its partner airlines.
• $75 Annual Fee (reduced fee may apply, ask for details).1