It would be great if it were possible to search on layers within a file without having to open a file. At best searching layers within an open file. Anything to save time on hunting and pecking through PhotoShop files for layers that I need to reuse. Maybe Bridges could offer this, make it more useful. This would be a very big help for design reuse and iteration. I imagine I am not the first one to post this but want to communicate the need for this type of feature.
Monica - this functionality already exists, within Apple's Spotlight. I'm not sure if the Windows version of Spotlight (bottom left as opposed to top right of the interface, which they got round to 5 years later) holds the same functionality. Worth a try I would have thought, let me know how you get on.
I'm not 100% certain, but I believe the app FLOW has this functionality also. We installed it in our workflow but found it too intrusive and it slowed the system down somewhat. Definitely not for everyone but may work well for some.