Just picked up a Nikon 70-200mm f/2.8 VR II
This satisfies a much needed super telephoto zoom lens; the longest I had was a 70mm for a while and that didn't fare too well. I was unable to take proper shots of unsuspecting people.
My next accessory will be a TC-17 (1.7x) teleconverter. The 200-400mm is quite nice, but a bit over my budget not to mention will not get as much use.
LOVE mine! Why the TC-17 over the TC-20 III? I personally haven't used it but it sounds to be pretty good. Just curious.