GPS Maps Version 2006?

I just purchased an 08 AWD GT with NAV and the GPS maps version is 2006. Does anyone know when a new update is going to be released? If you buy an 08 car you should at least get the latest maps for free, which I think are 07. I have seen some people selling these updates maps on EBAY, but the dealership and MazdaUsa are unaware of the update. Can anyone shed some light on this?

I am seeing the current version online- Released: 2007 DENSO Mazda Part No.GP9A 66 DZ0 C - (K4238) - Just spoke to Mazda USA and they have no idea.

It seems as though some people have Part No.GP9A 66 DZ0 C (B) or (A) where B or A are in place of the C

(eyeballs) Also like to know more about this! Just got an 08 GT AWD also for couple of weeks and we can't find anything on the map for places that's been around town for over 5 years.