I couldn't find any reviews specifically for the D70, but take a look at
THIS. If you don't already know, B&H is the place for anything photography related. Great prices, great service.
Good Luck.
Oh, also try
www.fredmiranda.com or
http://www.dpreview.com. These are great photography forums. Check out the Sports Corner at the fredmirand site. Lots of surf shooters there.