Well, it looks like Rio Marketing is doing things right. I just opened my wife's latest Road Runner catalog and unexpectedly discovered the Fuse, Cali256 and Nitrus listed, with an arrival date of 9/25. (Pg66)

The nice thing; If you are a member of their 'Run America' club you get a 5% discount to _all_ catalog orders, or if you are a VIP member then you get a 10% discount.
Although it's not worth signing up just to save on a RIo product as the (discount savings - membership costs) doesn't kick in until the $400 mark, if you are already a member you can save $15 or $30 (depending on membership level) on a Nitrus. ie $285 or $270.

Incidentally, the membership benefits do look pretty good for the cost if you are into athletics...in particular their 60 day love it or return it, no questions asked guarantee.