Ah Ken "I ordered mine from...." Rockwell.
I got the 18-200VR lens too for my D200. It permanently benched my 18-70DX kit lens and depending on which lens you got with the D50, if it's the cheapo 18-55DX kit lens, you can sell that one too.
The 18-200VR is just 1 centimeter (0.4 inch) longer than the 18-70, a tad heavier but all in all a great, small piece of work, excellent for traveling around. The VR
works well. Focusing is fast and quiet, much like the 18-70. The lens also focuses quite close, even when stretched out to 200mm, I think it will focus at about an arm's length in front of your camera. Sharpness is about the same as the 18-70. Bokeh is quite good too.
The only major drawback for spotting is of course the slow aperture at 200mm (5.6). It makes shooting on a dreary day quite a bit harder (Bill's nice heli shots were made in nice weather). If you're at the 200mm mark a lot, you might want to consider a non-VR 80-200/2.8 lens, which a lot bigger and heavier, but has excellent glass and is quite fast and not as big and heavy (and EXPENSIVE) as the excellent 70-200/2.8VR, which seems to be the most lusted after Nikon lens in the world. You may be able to find an 80-200/2.8 for around the same price as the 18-200.
In terms of convenience though, the 18-200 is definitely a winner, I think it will be on my D200 for 97% of the time.
Good luck with your decision!