Are they out yet? I dont think so. But am still waiting for them. Heard they'll be out a few months later. Forget when le. I'm also eying on those. Meanwhile try the Eneloop. I got the 2500mah last year and they're still holding their charge. Preferably, get a charger that can discharge the unused energy inside. It prolongs the life of the battery and its charges.
i dont trust online claims. Meaning buying for a non official or authorised seller.. e.g hardwarezone.com or yahoo auctions. Their price is really sheap but their life span is less than 6 months before you start to notice the fast discharge rate. I bought 4AA 2500 sanyos online, less than 6 months their discharge rate is twice faster than the original in the box with charger. Furthermore i'm using those discharge charger types. I always discharge then recharge. I use them for my other hobby, flying helis. So batteries are very important.
When I went to Sanyo to exchange my batteries yesterday, I saw their retail pack of 4x 2700mAhs with battery case in their display showcase. They told me they are in talks with Best Denki. Don't know what that means.