Tweem takes over your WordPress site making it a microsite showing up to 4 tabs of just the tweets you want. You can list by user, tag or searches to make a place for someone to view your own Twitter content.
This theme is not free, only $15 from ShoppingThemes, and is a good way for a company to build a microsite with just their company tweeters, products or searches around their name. There is no other filtering, so be careful. A great way to have an automated page built for corporate sites in getting into social media.