The D90 is a great camera I used to use one, but have recently made the switch to dare I say it Canon!
I sometimes wish I hadnt made the switch as the D90 is a great body.
The two big things for me with the D90 are excellent viewfinder and great resolution screen ok the Canon is great as well but there is just something about the D90 plus the buttons and ergonimcs for me were great (Im a female though and have small hands) so if you have bigger hands you might not find other bodies a problem
Linda