If so, wait till early next year then, the certification process for final n products (with optional test) is going to be completed next month only. Then development time and testing, then FCC certification will take to next year. That's my wild guess, but I believe that's true.
On the other hand, one may wants a router now, and if it's a single band n product, the DIR-655 can be considered finalized and if necessary a firmware will do it anyway. HW wise the DIR-655 is not a bad product, as for firmware IMO D-Link is just having some rough sailing. It will pass, hopefully sooner than later.