A new SAW?

According to StrategyPage, the Marines are looking for a replacement for the venerable M249 SAW (Squad Automatic Weapon), and the US Army is watching to see what the Marines will do. I've heard reports both good and bad about the SAW, but it's all second-hand knowledge as I never got to carry or fire one. (The Guard units I was in had, at best, ancient M-60's.)