From 9to5mac:

Among the many topics discussed by Tim Cook at today’s Town Hall session with employees, the Apple CEO revealed some new Apple employee benefits. Giving a little more back to the people who worked so hard to make Apple one of the wealthiest corporations in the world, Cook announced that Apple employees will soon be given $500 discounts on purchases of new Macs and $250 discounts on purchases of a new iPad.

The new discount program will officially kickoff at some point during June 2012. A major caveat is that Apple employees may only utilize the opportunity every three years and employees must have been working for Apple for at least 90 days. The Mac discount side of the program excludes the Mac mini, which is already close to that $500 of credit. Apple employees currently have a 25 percent discount on Macs, so in many cases the $500 is a big deal. (Thanks iDannyOcean)

Update: This is on top of the already existing 25% discount.