Hilton is offering 2,500 bonus HHonors points to members that register and make a reservation for a stay between now and September 30, 2013 by 10:59AM EST tomorrow, Friday, May 24. To be eligible you first have to “Like” the Hilton page on Facebook and go through this link.
You can earn the bonus points for only a single reservation, and only the first 4,000 HHonors members to make a reservation and register are eligible. They make this pretty confusing because you first have to make your booking and then register after the fact, so there’s no way to know for sure up front whether you’ll be among the first 4,000 members (though if you book soon I assume you will be).
The bonus points will post within 4-6 weeks of the eligible stay.
Anyway, this is a very nice bonus if you have a stay to plan anyway (or have a reservation you can rebook now), though I wouldn’t go out of my way to make a reservation just to take advantage of this promotion.