This LA Times article by Richard C. Paddock (currently at the New York Times) attests that the practice was revived around the turn of the Millenium. Dayak tribespeople, upset with their treatment by Madurese settlers, revived their century dormant headhunting traditions (my emphasis):
Before their killing rampage ebbed, the Dayaks had slaughtered nearly 500 Madurese, according to the Indonesian government. Dayak leaders say their warriors killed 2,000. Hundreds were beheaded in towns, villages and the jungle as they tried to flee. Headless corpses with their hearts ripped out could be seen along the roadside.
Some of the modern-day headhunters followed the ancient rituals of drinking the blood and eating the hearts of the people they killed to subdue their victims' spirits and absorb their magic.
So we have this ritual practice (headhunting) occurring roughly between 1997 and 2001, with claims of several hundred Madurese settlers as victims. At least two reputable journalists report that at least some of the Dayak warriors drank their victims' blood, though the precise meaning of that ritual varies between the two accounts.