Sharpening and downsampling scanner images

Wilfred van der Vegte has some tips on using Photoshop's unsharp mask filter: Sharpening and downsampling.

My flavour-of-the-month workflow for creating the images on my homepage is:

• Start with a 3800px 16 bit full res. scan, in Adobe RGB
• Apply levels, color correction etcetera
• USM 400, 0.3, 0 (Color negatives are probably better of with a higher threshold)
• Retouching
• Bicubic resize to 2400px
• USM 300, 0.3, 0
• Bicubic resize to 1200px
• Reduce color depth to 8 bits
• USM 150, 0.5, 10 (Edit > Fade somewhat)
• Color space conversion to sRGB (Image > Mode > Conversion to Profile). Perhaps some extra color correction with Adjustment layers.
• Bicubic resize to 600px
• USM at about 150, 0.5, 10