You know that print and broadcast interviews can help sell books. Very much so.
Chats are often widely advertised, online and offline.
That exposure, along with the chat itself, can help you keep your book in front of potential readers. As an added bonus, many new media outlets archive their transcripts and make them available at their sites. Often, search engines pick up those links. That means you'll increase your general visibility on the Internet as you create buzz for your book. A host often can interview you by telephone and run chatters' questions by you.