Antique Light Filter and LAB Blurb

I've been using Lightroom to organize and export my files for a quick preview of what the result might look like. After choosing what I like, I can squeeze more quality out of them in Photoshop CS3 - like the LAB sharpening method. Unfortunately, if I like an effect in Lightroom, it's not so easy to replicate in Photoshop so this is just the export. 
I learned about the LAB method from a friend a while back. You should use it when editing 16-bit files. If you use it on 8-bit files, it has been mathematically calculated that you will lose more colour information from the resulting colour space changes (RGB --> LAB --> RGB) than the benefit is worth. LAB sharpening affects the lightness channel. Lightness is a representation of how the human eye perceives brightness through the colour spectrum. It won't increase edge contrast or introduce colour artifacts like typical USM.

More about it here and how to do it here.

The easy way to do it (do this after you resize):
1) Convert to LAB colour space
2) Select the "Lightness" channel only
3) Sharpen (I like Smart Sharpen w/ lens blur option and 10-20%)
4) Select "Lab" channel
5) Convert back to RGB colour space

Not sure why I'm linking a thumbnail size since you can't tell the difference, you'll have to click below to view the uncompressed PNG version:

 
Click and view 'all sizes'