Rumour has it. Nikon should have 2 new DSLRs announced by end of Q3. And it's probably the most unexciting announcement in years (surprise me, Nikon).
If rumours are accurate, the D300S will be no different from D300, except with video (most likely HD) recording and supports SD-card. Some sites claim it's a dual card-slot, so the other slot might remain as CF-card. What I would hope is better high-ISO quality comparable to D700.
The D3000 will be a lower-end D5000, so it'll be a replacement to D60. Possibly no video recording.
That's it from Nikon? Over to you, Canon.