NikonUSA's rebates changed a bit on May 2nd. The D300 has dropped off the instant rebate bandwagon. While there are rumors that the D300 has been discontinued and the cancellation of rebates adds fodder to those, both the D300 and the D60 actually seem to be in short supply due to Nikon's previous production cutbacks coupled with slightly stronger than expected demand. That doesn't mean that a D400 couldn't appear soon (I still think August is more likely), but I don't think the paucity of D300 supply has to do with an imminent model change. When Nikon announces their yearly financial results later this month we'll have a better handle on new product timing, as it's usually reflected in their forward estimates and re-inforced by "whisper information" in the Japanese business press.