Earn bonus SkyMiles with a qualifying stay at participating Hilton HHonors properties.  Maximum of 1,500 SkyMiles per stay.  Not the most generous in the world, but if you’re collecting points and SkyMiles from Hilton, you may as well get some extra miles.  Go to http://www.hiltonhhonors.com/Delta3XBonus for details and to register.  Promo ends on June 30, 2010.