P2 solves all this by moving the conversation inline on the homepage. Conversations can be fully threaded using 2.7’s new comment features.
Twitter Search is currently just a text matching search engine–it finds keywords based on the text of the most recent Tweet. But twitter hopes to change that by looking at the pages people are linking to within their Tweets. A Twitter crawler will visit the links, index the page and then correlate that 3rd-party content with the Tweet itself.