This may seem a little too simple. I don't use any specific numbers, and I may use different software than you do, but I just sharpen for my own, on screen display. I haven't seen anything that would disappoint me about the results on smugmug.
The real issue for sharpening comes when you are going to sharpen for display on a significantly different media, especially at a significantly different size.
Nikkors: 17-55mm f2.8, 18-200mm f3.5-f4.5 VR, 70-300mm f4.5-5.6 VR, 35mm f2, 50mm f1.8, 55mm f2.8 AI-S micro, 105mm f2.8 VR micro
Other Lenses: Tokina 12-24 f4, Tamron 75-300mm f4-5.6 LD macro
Stuff: Nikon SB800, Nikon MBD200, Gitzo 1327 Tripod w/RRS BH-55LR Ballhead, Sekonic L-358 meter