You could try the 2 Hawaiian Airline cards for 35K miles each which convert to 70K Hilton points each.

Or the 40K US Air card.

Or the Amex or Citi Hilton cards.

Or the Marriott cards.

Or the Air Tran card which will disappear soon.

You shouldn't expect 75K and 100K bonuses to last forever, but there are still good opportunities out there.

Let's not forget that just 2 years ago the standard bonus was a whopping 25K miles!