Hilton HHonors - Current Best Hhonors Amex Offer

Hi. What is the best current Hhonors Amex offer? The one posted in an ad here where you get extra points for spending $5000 in the first 5 months?

http://boardingarea.com/blogs/viewfromthewing/2008/03/12/up-to-52500-bonus-miles-for-new-hilton-american-express-card/

This is 30K bonus when spending $1500 in 3 mos