My Tweet Tweet plugin hasn’t been updated in a while. It stores Twitter conversations in your local database. Not just your own tweets but also the tweets of those you follow.
Storage can be a problem once the plugin has been running for a few months however. The log table gets quite big so last year I added code to the plugin that broke up those tables once they reached a predetermined size. In my case I go with 100,000 rows. I have over 20 of those tables now (some in an old database I haven’t copied over yet) and until today the search function in the plugin only searched the most recently created table.
All that’s changed now. It’ll search back through the other tables and compile a list of up to 10,000 tweets. It’s still a little rough but if you’ve been running the plugin for some time give the development version on the developers page a go. Here’s a search for Aurora. The original image was 21793 pixels high, so this is the latest and earlier tweets in that search: