[robg adds: Actually, Command-T is documented as "Add to Sidebar" in the Finder's menu. However, I wasn't aware that you could add search results to the sidebar. This isn't Tiger's smart folders, though -- you'll only be saving the results of the search, not a command that updates each time you select the results folder. So as you add and remove files from the search location, the results folder won't change. I also can't figure out where this temporary folder lives -- you can't navigate up from it, and it's not located anywhere in the user's folder that I can see (searched in the Terminal via find . -name....). While this may not be ultra useful, it is interesting that you can save a search results folder...]

