We are constantly updating you with the latest news from iPublishCentral at http://twitter.com/ipublishcentral. Our twitter account is where we tweet about all the new publishers and their new publications. We announce the books that they have, discuss them and look forward to your feedback and reviews.
We are also a part of the #booktrade, it is a directory for those in book trade and using twitter. http://www.highspotinc.com/blog/2008/12/a-directory-of-book-trade-people-on-twitter/