Summary: The SB-600 is available for cheap used. It works great, once you set it up. It takes a bit of programing with an arcane menu system to get it set up... To see a more thourough review and example glamour pic taken using the SB 600, see http://glamourphotography.co/?
Pros: Lowest priced speedlight compatible with Nikon Creative Lighting System
Nikon SB-600 Speedlight review by libertinephotography
16 September 2008
Summary: The SB-600 is a wonderful mid-tier lens (if you notice, the cons that I stated are largely resolved in the SB-800, but for a LOT more money). What I really love about this flash is that it is CLS functional even as a wireless slave.
Pros: Useful Programming, Can Be Used As A Wireless Slave, Good Guide Number
Cons: Recycling Time, Cannot Be Used As A Commander, Limited Customization of Features
Summary: You can take spectacular photos of any social gathering with the panning and tilting head of this flash. Getting an external flash is not primarily about having more power or being able to take more shots continuously (unless you're a paparazzo), but about being able to control light.
Pros: Pan and tilt head transforms photos of social events, recycle rate useful for action shots
Cons: Bouncing can be tricky, widest f-stop must be forced on D80
Summary: This flash has done as much to improve my photography as any of my lenses. I guess that's the best compliment I can give a piece of camera equipment. I use it with the Tamron 17-50 and 90mm on a D80.
Pros: fantastic pictures, simple, flash meetering is fantastic
Cons: AA battery management, Only twists past 90 degrees in one direction?
Summary: I hesitated quite a while before I decided to go ahead and buy this flash. Haven't had any regrets. I've looked at Metz's iTTL flashes but am glad I got me a nikon instead. This flash integrates so incredibly with my D50!
Pros: All the power I need in a very simple package