As payments to headhunters have skyrocketed, companies have become much more generous with bonuses and perks for employees who help find recruits. EarthLink Networks, an Internet service provider in Pasadena, Calif., with $180 million in sales, pays an instant five-figure bonus to workers who help fill such hard-to-hire positions as "senior Unix engineer." The bonus is typically $10,000, but in some cases the company has also thrown in a trip to Maui. Mike Ihde, vice-president of HR, says the cash and travel bills still add up to far less than what EarthLink would pay a recruiter to find such sought-after talent.