D100 compared to Canon 10D side by side
Looks to me like the new Canon is now offering a number of features that where already available in the Nikon D100. For a side by side overview of the D100 compared to the Canon 10D.
The Canon now has improved AF compared to the earlier D60 (was a weakness compared to the D100), High ISO up to 3200 like the D100, improved color space control like the D100 etc.
The way I see it, the major benefit of the Nikon system is the new DX lens format. With a D100 and the 12-24DX lens you get the coverage of an 18-36mm in 35mm terms, whereas with the Canon you are limited to the 17-40mm "L" zoom lens which offers the equivalent 35mm wide-angle coverage of a 27mm -64mm perspective.(1.6x factor)
IMHO, the Canon's big advantage is the current price ($US 1500 vs $US 2000 for the D100) however, the 'buzz' is that Nikon will be adjusting their price in the next couple of weeks..
Isn't competition great, lower prices for all..