rumour only,
i already posted it a while back... at the cebit computer trade show in march, i talked to some guys from garmin. although they had no representatives of the avionics department at the show, one guy hinted that there is supposedly a GNS600 in the works... basically a modular and scaled down version of the G1000! if it's coming out soon, then i would guess it will be revealed at oshkosh...
rgds, bernie