I would suggest to wait – unless you need this camera or the Nikon D90 right now for at least two or three paid shootings and you are very sure, that there are more paid shootings coming.

If you don’t need one urgently right now, I would rather wait because it is an ‘old’ wisdom in these technology century never to buy first generation products.

And the other ting is: Will this become consumer standard or just a niche product with uncertain future? Remember: DAT and DCC, Floppy Disk foto cameras, Betamax vs. VHS, etc., etc., etc.

So wait until other companies priduce such cameras and by that time, Canon and Nikon will have introduced their second generation products (compare Mk. I and Mk.II or Nikon D70 and D70s).

Some frustrated prosumers and consumers even say, that they feel being Beta-Testers for company products rather than buying well tested products.
Of course that is much more to happen with consumer products rather than with prosumer or professional products like these Canon or Nikon D90.