Chuck,
I use marios bundler plugin, which has an option to capture all tiddlers imported in an import bundle. I also have a variation of the recent tab for "recent System" tiddlers that allows me to see system tiddlers modified. An issue is that imported tiddlers bring with them their modified and created dates so although you may have recently installed them they are not recent in date fields.
A simple work around is after importing you get "The following tiddlers were imported" in the $:/Import tiddler, if you edit this before it is overridden you can copy its content eg;
# [[option-tags.bundle]]
# [[$:/PSaT/option-tags]]
# [[$:/PSaT/option-tags/macros]]
# [[$:/PSaT/option-tags/ViewTemplate]]
Into a regular tiddler. This regular tiddler will be in recent and will list your recently imported tiddlers, and contain links to each.
This could of course be automated further.
Regards
Tony