I recently, after a 4 month wait for my company to get the discs, upgraded to Snow Leopard. I trusted Time Machine for my backup of the Leopard install, and did a wipe and install. I like to start with a clean system whenever I can.
After having installed Snow Leopard, I needed to restore some files, including my .profile. The only trouble is that, as far as I was able to figure out, there is no way of displaying hidden files when you are in Time Machine mode, and as a consequence, no way of restoring them unless you restore the whole directory.
There is a way of displaying hidden files in Finder when not in Time Machine, and it turns out that if this mode is enabled when you start Time Machine, hidden files are displayed also within Time Machine.
You need to do the following two commands in order to turn on the display of hidden files
$ defaults write com.apple.finder AppleShowAllFiles TRUE
$ killall Finder
You may now restore your files. When you have restored the files and want to turn off display of hidden files (they clutter things up in the display), just do the same two commands again, but replace "TRUE" in the first command with "FALSE"