I got the opportunity to fully use and test the Dynamic AF / Auto Area AF and AF-C features of the D300 when I did whale watching in Alaska recently.
Check out the following posts.
http://blog.anands.net/index.php?showimage=565
http://blog.anands.net/index.php?showimage=564
http://blog.anands.net/index.php?showimage=563
http://blog.anands.net/index.php?showimage=562
http://blog.anands.net/index.php?showimage=561
I used AF-C and dynamic area AF / Auto Area AF for these shots with a 70-200 VR and 1.7 TC. I had great light, but that lens + TC combination is not the fastest focusing kit.
I shot about 600 exposures at 6-8 fps over a 20 min period. I was stunned to find 500+ in focus exposures.
I touched upon this a little bit in the d80 comparison post, but I had the most luck when I left the camera handle all the decisions for itself.
D300 totally rocks!











