Loved my Airhawk when I was motorcycling but I don't see it being something I would want on a bicycle. The airhawk has air pockets with small openings between them. The idea is to get just enough air in it to relieve the pressure points, while keeping you connected to the saddle.
On a bike where you're pedaling, I don't think the air would move around fast enough to achieve the desired result. If a saddle doesn't fit your posterior, its not likely going to get better with any add-on device.