After a weekend of confusion at dealers, who were receiving different information from different contacts, NikonUSA has finally communicated the update and extension to their expiring rebate program. Basically, the body+lens rebates continue with some substractions and additions.
The subtraction is the "any DSLR body" part. The rebates now only apply if you buy a D300s or D700 body along with the lens (or Speedlight). Also, the 18-200mm DX lens is no longer rebated if you buy a D700 (FX) body. The addition is that 10-24mm DX is added to the D300s body+lens rebates (US$300), the recently introduced 16-35mm lens is added to the D300s and D700 rebates (US$300), and the SB-900 Speedlight is also added to both bodies for rebate (US$100).