That's right, for every night you spend at participating Hilton Family hotels worldwide between April 13 and June 30, 2009, you'll earn 1,000 Hilton HHonors^® bonus points. After reading the fine print it seems all you have to do is register before check in and you're set. This promotion will run for a couple of weeks and you must check out before or on June 30th. "Registered members must check-in and check-out between April 13 and June 30, 2009 in order to receive bonus points."

According to some estimates each Hilton point is roughly worth 0.60 cents. In other words, 1,000 Hilton Honors points is somewhere around 6 dollars, not too bad for Hilton. I guess they had to step up after Marriott and SPG were doing Mega Bonus promotions already. 

To register, do so here