While I don't know where the list is of non-participating hotels, here are the T&C for convenience purposes. I added some formatting to make them easier to read.
TERMS & CONDITIONS:
To be eligible for this offer, you must
- select Delta Air Lines as your Double Dip® earnings partner in your Hilton HHonors™ account profile,
- register online at www.hhonors.com/moreskymiles before booking your first stay, and
- complete a required stay (1 night, 2 nights, or 3+ nights) at a participating hotel within the Hilton Worldwide portfolio from January 3 through March 31, 2011.
You must be a Hilton HHonors member to earn Points & Miles™ for hotel stays.
Bonus Delta Mileage- Fixed Mileage Member:
- Hampton Inn & Homewood Suites hotels - earn your standard base miles (100 miles for Hampton Inn & Homewood Suites stays) plus
- 500 bonus miles for a 3-night (or more) stay (600 total miles),
- 200 bonus miles for a 2-night stay (300 total miles), or
- 100 bonus miles for a 1-night stay (200 total miles)
- Other participating hotels within the Hilton Worldwide portfolio - earn your standard base miles (500 miles with all other brands within the Hilton Worldwide portfolio) plus 500 bonus miles a night (maximum bonus of 1,500 miles).
- Variable Mileage Member
- Hampton Inn & Homewood Suites - Earn your standard base miles (1 mile for every U.S. dollar spent) plus
- 500 bonus miles for a 3-night (or more) stay,
- 200 bonus miles for a 2-night stay, or
- 100 bonus miles for a 1-night stay.
- Other participating hotels within the Hilton Worldwide portfolio - earn your standard base miles (1 mile for every U.S. dollar spent) plus 500 bonus miles per night stay (maximum bonus of 1,500 miles) on qualifying stays at the.
- Miles are not eligible to earn Medallion Qualification Miles.
- You can earn miles for multiple stays with this offer.
- Allow up to six weeks after qualification, and after promotion has ended, for miles to be credited to your account.
- This offer may be combined with other offers and/or promotions.
- All SkyMiles program rules apply. To review the Delta Skymiles full Terms & Conditions please visit delta.com/skymiles. Hilton HHonors™ membership, earning of Points & Miles™ and redemption of Points are subject to HHonors Terms and Conditions.