The guys at 30 Boxes have just released a second Twitter application. It is called Power Twitter (v 0.83) and it is a plugin for the Firefox browser that "greatly enhances" Twitter. We haven't tried it yet but here are the features from their website:

* Photo sharing with embedded flickr photos * Video sharing with embedded youtube videos * Shared tinyurls are unwound so you know where they link to * All links are mapped to their web page titles * Additional user information is mapped to twitter users thanks to data conduits via 30 Boxes (e.g. flickr accounts, blog posts, del.icio.us...